High Anisotropy Field Research Articles

Optimized Route for the Fabrication of MnAlC Permanent Magnets by Arc Melting

The rare-earth-free MnAlC alloy is currently considered a very promising candidate for permanent magnet applications due to its high anisotropy field and relatively high saturation magnetization and Curie temperature, besides being a low-cost material. In this work, we presented a simple fabrication route that allows for obtaining a magnetically enhanced bulk τ-MnAlC magnet. In the fabrication process, an electric arc-melting method was carried out to melt ingots of MnAlC alloys. A two-step solution treatment at 1200 °C and 1100 °C allowed us to synthesize a pure room-temperature ε-MnAlC ingot that completely transformed into τ-MnAlC alloy, free of secondary phases, after an annealing treatment at 550 °C for 30 min. The Rietveld refinements and magnetization measurements demonstrated that the quenched process produces a phase-segregated ε-MnAlC alloy that is formed by two types of ε-phases due to local fluctuation of the Mn. Room-temperature hysteresis loops showed that our improved τ-MnAlC alloy exhibited a remanent magnetization of 42 Am2/kg, a coercive field of 0.2 T and a maximum energy product, (BH)max, of 6.07 kJ/m3, which is higher than those reported in previous works using a similar preparation route. Experimental evidence demonstrated that the synthesis of a pure room-temperature ε-MnAlC played an important role in the suppression of undesirable phases that deteriorate the permanent magnet properties of the τ-MnAlC. Finally, magnetic images recorded by Lorentz microscopy allowed us to observe the microstructure and magnetic domain walls of the optimized τ-MnAlC. The presence of magnetic contrasts in all the observed grains allowed us to confirm the high-quality ferromagnetic behavior of the system.

Key factor for low anisotropy and high irreversibility field in (Cu,C)Ba2Ca3Cu4O11+δ

In cuprate superconductors, the Hg-, Tl- and Bi-based systems with multilayers of CuO2 planes within one unit cell usually have critical temperatures higher than 100 K. However, the applications of these materials under high magnetic fields in liquid nitrogen temperature region are strongly limited by the very high anisotropy and strong vortex motion. The observation of an unprecedented high irreversibility field and low anisotropy in (Cu,C)Ba2Ca3Cu4O11+δ with Tc = 116 K was an exception, and the reason remains elusive. Here, we report the investigations on (Cu,C)Ba2Ca3Cu4O11+δ single crystals. The angle-dependent resistivity under different temperatures and magnetic fields reveals clear evidence of lower anisotropy and higher irreversibility fields. The high resolution scanning transmission electron microscopy allows to clearly visualize that CuO chains and CO chains are formed alternatively at the places where the heavy metal oxides would locate. First-principle calculations confirm that the newly formed CuO chains in the charge reservoir blocks significantly enhance the c-axis coherent electronic conduction, lower the anisotropy and strengthen the irreversibility field. This discovery may be extended in a general sense to other layered cuprates and stimulate high power applications of cuprate superconductors in liquid nitrogen temperature region.

Microstructure, magnetic domains and magnetic properties of Ti/Fe/Ni81Fe19/Fe/Ti multilayer films by obliquely deposition

The metallic magnetic thin films are widely used in high-frequency magnetic devices, the reliability of which greatly depends on the saturation magnetization (Ms) and resonance frequency (fr) of the films. However, increasing the operating frequency of the magnetic thin film is extremely challenging. This study investigates the microstructure, magnetic domains and magnetic properties of obliquely deposited Ti/Fe/Ni81Fe19/Fe/Ti multilayer films. The coercivity distribution of the deposited films is investigated by first order reversal curve (FORC) measurements. The result of static magnetic properties revealed the in-plane uniaxial anisotropy with a high anisotropy field (Hk) up to 495 Oe. A magneto-optical Kerr microscope image displayed the multi-step magnetization reversal processes at different oblique angles. Complex permeability spectra indicated that the resonance frequency increases from 1.27 to 4.71 GHz as the deposition angle is increased from 0° to 25°. Thus, Ti/Fe/Ni81Fe19/Fe/Ti multilayer film with tunable magnetic performances is one of the good candidate materials for microwave devices.

Construction of high-performance multi-main-phase LaCe-based sintered magnets by chemical heterogeneity enhancement

• The H cj + (BH) max of the 40 wt% LaCe substituted Nd magnet reached 47.34. • The Pr-rich phase with a lower melting point optimized GB phases' wettability. • The high H A Pr 2 Fe 14 B grains provided strong chemical heterogeneity. • The continuous GB layers and chemical heterogeneity guarantee high performance. To further optimize the comprehensive magnetic properties of LaCe-based sintered magnets prepared by constructing a multi-main-phase (MMP) structure, Pr-Fe-B was used as a LaCe-free alloy to prepare MMP sintered magnets with 40 wt% LaCe substitution. Due to the high anisotropy field ( H A ) of Pr 2 Fe 14 B grains, strong chemical heterogeneity could be provided in MMP magnets. In addition, the Pr-rich phase with a lower melting point enters the MMP magnet, optimizing the composition and structure of the grain boundary (GB) phase. It is beneficial to improve the wettability and promote the formation of continuous GB layers. As a result, the H cj and (BH) max of the MMP magnets reached 9.64 kOe and 37.70 MGOe, leading to an excellent overall magnetic performance of (BH) max (MGOe) + H cj (kOe) = 47.34. This will serve as a reference for the high performance of MMP LaCe-based magnets.

Computational prediction of new magnetic materials.

The discovery of new magnetic materials is a big challenge in the field of modern materials science. We report the development of a new extension of the evolutionary algorithm USPEX, enabling the search for half-metals (materials that are metallic only in one spin channel) and hard magnetic materials. First, we enabled the simultaneous optimization of stoichiometries, crystal structures, and magnetic structures of stable phases. Second, we developed a new fitness function for half-metallic materials that can be used for predicting half-metals through an evolutionary algorithm. We used this extended technique to predict new, potentially hard magnets and rediscover known half-metals. In total, we report five promising hard magnets with high energy product (|BH|MAX), anisotropy field (Ha), and magnetic hardness (κ) and a few half-metal phases in the Cr-O system. A comparison of our predictions with experimental results, including the synthesis of a newly predicted antiferromagnetic material (WMnB2), shows the robustness of our technique.

Enhancing the grain boundary diffusion efficiency of Tb for Nd-Fe-B magnets using dual-alloy diffusion source

Grain boundary diffusion is an effective approach to enhance coercivity for Nd-Fe-B magnets with reduced consumption of heavy rare earths (HRE). However, during diffusion treatment, the HRE tends to accumulate at the magnet surface, leading to an insufficient coercivity improvement and a decreased magnetic hysteresis loop squareness. Here, a Pr-Al-Cu/Tb-Al-Cu dual-alloy diffusion source is proposed to improve the diffusion of Tb element. During the GBD process, the low melting point Pr-Al-Cu alloy has higher diffusion rate than the Tb-Al-Cu alloy. The formation of continuous grain boundary phase by Pr-Al-Cu diffusion is beneficial to constructing effective channels for the subsequent diffusion of Tb. As a result, the dual-alloy diffusion enhances the coercivity of an initial magnet from 1040 to 1911 kA/m and a high loop squareness of 91.31% is also obtained. In comparison, the coercivity of the magnet treated by the Pr-Tb-Al-Cu single-alloy source was only enhanced to 1832 kA/m with loop squareness of 87.44%. The microstructure characterizations revealed that, by dual-alloy diffusion, both Pr and Tb can infiltrate deeply from the diffusion surface to the interior of the magnet. The formation of (Nd,Tb)2Fe14B phase with high anisotropy field and continuous grain boundary phase contribute to the coercivity enhancement. Using the dual-alloy diffusion source, the HRE resources can be efficiently utilized for increased infiltration depth by avoiding the formation of over-thick Tb-rich grain shells. This facile and flexible process is also attractive for industrial application.

Pr80Al20 surface-coated DyF3 modified sintered Nd-Fe-B magnets for large coercivity increment via grain boundary diffusion

A large coercivity increment of 11.63 kOe is obtained by grain boundary diffusion with composite powders of Pr80Al20 surface-coated DyF3. The coercivity increases from the original 12.76 kOe to 24.39 kOe and 23.28 kOe in PA-0.7 and PA-0.9 diffused magnets (Pr80Al20:DyF3 = 7:3, 9:1 in wt%), which shows an increase of 91.15% and 82.45%, respectively. The temperature coefficient of coercivity of diffused magnets is improved due to the high magnetic anisotropy field (HA) of (Nd, Pr, Dy)2Fe14B and the optimized microstructure. Excellent diffusion efficiency and Dy diffusion depth are obtained owing to the betterment of Pr-Al-rich grain boundary (GB) phases. Microstructural features show that the combined strengthening effect of magnetic isolation by the continuous Pr-Al-rich GB phases and magnetic hardening by Dy-Pr-rich shells significantly improve the coercivity of the PA-0.7 and PA-0.9 diffused magnets. Especially, no accumulation of Dy element occurs in the PA-0.9 diffused magnet. The composite diffusion sources provide a new method to improve diffusion efficiency of Dy.

Heterovalent substituted BaFe12-xSnxO19 (0.1≤ x ≤1.2) M-type hexaferrite: Chemical composition, phase separation, magnetic properties and electrodynamics features

Hexaferrites are usually used in devices for frequencies of 8–75 GHz. In this work, it is shown that Sn-substituted hexaferrite can be used for electromagnetic shielding and at lower frequencies (for example, in the L-band and S-band) as absorbing materials. The paper defines a solid-state reaction technique for preparing BaFe12−xSnxO19 (0.1 ≤x ≤ 1.2). The samples are characterized by XRD, SEM, VSM, and VNA. The study shows that increasing the Sn-substitution leads to weakening the interaction between the magnetic sublattices. So, in general, the saturation magnetization (Ms) decreases. Low saturation magnetization at high coercivity valuesgives a high anisotropy field, which provides significant absorption and matching impedance. The sample with substitution of x = 1.2 is the most absorbing sample (more than 99.99% of the incident energy absorbed for 10 mm thickness). The investigated samples have the potential to be useful absorption materials for shielding production (materials that absorb electromagnetic radiation)

Influences of different Bi2O3 additive amounts on static magnetic characteristics, micromorphology and ferromagnetic resonance linewidth of M-type Sr hexaferrites

Considering the improvement of electronics regarding high frequency and miniaturization, SrM hexaferrites need to exhibit high anisotropy field Ha, high remanence ratio Mr/Ms, and low ferromagnetic resonance linewidth ΔH to create microwave devices and equipment with planarisation, miniaturisation, and high frequencies. The key to achieving self-biased microwave devices with high-frequency is to simultaneously achieve high Ha, high Mr/Ms, and low ΔH. However, it is hard to meet these requirements. In this study, Sr0.4La0.3Ca0.3Fe11.85Al1.0Co0.15O19 was used to study the effect of different doping amounts of Bi2O3 on its magnetic characteristics, micromorphology and FMR linewidth. With the increase of Bi2O3 doping, the grain size of the sample gradually increased, and the uniformity of the grain size gradually decreased. When the Bi2O3 doping amount x increased from 0 to 1.2 wt%, the 4πMs and 4πMr values increased and the coercivity displayed the opposite tendency. The samples showed great uniaxial anisotropy. The magnetocrystalline anisotropy field Ha shows a trend of initially decreased and then increased. When x = 1.0 wt%, Ha reaches the maximum value of 28.9 kOe. At this time, the ferromagnetic resonance linewidth ΔH of the sample is 1578 Oe. The theory of IGA was adopted to divide the FMR linewidth into two parts ΔHa and ΔHp. Accroding to the results, ΔHa takes the bigger proportion of linewidth. However, the change in ΔHp is not negligible. When x = 1.0 wt%, the sample showed its best performance (4πMs = 3412 Gs, 4πMr = 2905 Gs, Hc = 2649 Oe, Mr/Ms = 85.1%, large Ha = 28.864 kOe, and ΔH = 1578 Oe). The SrM ferrite materials provided in this study can potentially be used in the microwave engineering, high-frequency, and self-biased devices.

Compact Self-Biased Q-Band Circulators

This article deals with the design and fabrication of compact self-biased $Q$ -band circulators. A pre-oriented substituted strontium hexaferrite that has a high anisotropy field was used to design a planar circulator at 38 GHz. The component has been measured in the 32–40 GHz frequency band at different temperatures. Measured insertion loss as low as 0.45 dB together with a high isolation level has been demonstrated. Moreover, the component demonstrated a quite stable temperature behavior. However, a slight shift toward low frequencies is observed compared to the simulation. Retro-simulations showed that small variations of the metallic strips’ dimensions induce significant S-parameters changes. These experimental results demonstrate that substituted strontium hexaferrites have a high potential for the realization of ultra-compact $Q$ -band circulator but also that the metallization process resolution is crucial for performance reproducibility.

Effects of La substitution on micromorphology, static magnetic properties and low ferromagnetic resonance linewidth of self-biased M-type Sr hexaferrites for high frequency application

M-type Sr (SrM) hexaferrites have been widely applied in millimetre/microwave ferrite devices such as circulators and isolators. SrM hexaferrites must exhibit a high remanence ratio Mr/Ms, a high anisotropy field Ha, and a low ferromagnetic resonance (FMR) linewidth ΔH to further develop millimetre/microwave equipment and devices with high frequencies, miniaturisation, and planarisation. However, it is difficult for M-type hexaferrite to simultaneously meet the requirements of high Mr/Ms, high Ha, and low ΔH, which are key to realising high-frequency self-biased ferrite devices. In this work, Ca–La–Co-substituted SrM ferrite was prepared, and the influence of La substitution on the micromorphology, static magnetic properties, and ΔH values of SrM hexaferrites is discussed in detail. The results demonstrated that as the La substitution content x increased from 0.0 to 0.5, the saturation magnetisation 4πMs and coercivity Hc initially increased, and then decreased. The Ha values of all samples were higher than 18 kOe. The FMR linewidth ΔH initially increases, and then decreased after reaching a maximum value at x = 0.2. The independent grain approximation theory was used to analyse the changing trend of the FMR linewidth. The results showed that the crystalline anisotropy linewidth ΔHa accounted for a larger proportion of the FMR linewidth than the porosity linewidth ΔHp. The sample with a La substitution content x of 0.3, exhibited the best performance (4πMs = 3915 Gs, 4πMr = 3387 Gs, Hc = 1818 Oe, Mr/Ms = 0.865, large Ha = 23.99 kOe, and ΔH = 1548 Oe at 58.8 GHz). The materials prepared in this research have significant potential for application in high-frequency self-biased devices and microwave engineering.

Electronic structure and magnetic exchange interactions in Zn diluted CuFe2O4 magneto-ceramics

We report a detailed study on the electronic structure and temperature (1.9K≤T≤900K) dependence of magnetization in Zn diluted cuprospinel [Cu1−xZnxFe2O4 (0≤x≤0.6)]. The electronic structure determined from the x-ray photoelectron spectroscopy and Rietveld analysis of the x-ray diffraction patterns reveals the structure to be (Cu(1−x)/5ZnxFe4(1−x)/5)A [Cu4(1−x)/5Fe2−4(1−x)/5]BO4. Beyond a specific dilution limit (0.05≤xp≤0.1), a sudden phase-change from tetragonal (I41/amd) to cubic (Fd3m) is noticed with an alteration in the A–O–A (3.29%) bond angle and A–O bond length (0.67%). Our analysis shows that all these compounds order ferrimagnetically below the Néel temperature (TFN) due to dissimilar site-specific magnitudes of spins, yet, they undergo a second transition at low temperatures T1∼66K with asymptotic Curie temperature TA(=C/χ0) as high as −547.2K for the undoped case. Dilution with Zn cause quadratic decay (b2x2+b1x+yo) of the ferrimagnetic ordering temperature from 743 K to 370.5 K for x=0 and 0.6, respectively. On the contrary, a significant increase in the saturation magnetization (MS) was observed with increasing x until the critical composition xc∼0.4 beyond which MS decreases continuously (MS=1.64μB and 4.73μB for x=0 and 0.4, respectively). From the temperature dependence of inverse paramagnetic susceptibility [χ−1(T>TFN)] data and Néel’s expression for ferrimagnets, we evaluated the molecular field constants and exchange interactions (J) between the tetrahedral A- and octahedral B-sites. A systematic compositional dependence of this analysis yields that JAB (∼25kB for x=0) is the dominant exchange interaction in comparison to JBB and JAA; however, JAB decreases significantly with increasing the composition (JAB∼−5.5kB for x=0.6). The isothermal magnetization data and law of approach to saturation analysis reveals that the investigated system possesses very high anisotropy field HK ≥5.5kOe with cubic anisotropy constant K1≥1.6×106erg/cc at xc.

Electrochemical synthesis and magnetic properties of Nd-Fe-B-Tb nanowires

Nd-Fe-B-Tb nanowires were synthesized in AAO templates by electrodepositon through doping Tb3+ into Nd-Fe-B solution. The as-deposited nanowires are composed of Fe and amorphous phases, showing soft magnetic properties. Annealing makes Nd-Fe-B nanowires consist of Nd2Fe14B, Fe3B and NdB4 phases and exhibits hard magnetic characteristic due to the formation of hard Nd2Fe14B, Fe3B phases. After adding Tb3+, some new (Nd,Tb)2Fe14B, Tb2Fe14B, Fe3Tb and TbB50 phases, form in annealed nanowires. The existence of (Nd,Tb)2Fe14B and Tb2Fe14B phases with high anisotropy fields, the interface elastic coupling effect between different phases and the coherent phase interface increases the coercivity and remanence. Nd-Fe-B-Tb nanowires exhibit the optimal comprehensive magnetic properties at 0.05 mol/L Tb3+ concentration due to the highest content of Tb2Fe14B phase.

Crystallographic preferred orientation, magnetic and seismic anisotropy in rocks from the Finero peridotite, Ivrea-Verbano Zone, Northern Italy – Interplay of anisotropy contributions from different minerals

Mineral alignment can provide valuable information on a rock's geological history. Many structural, tectonic, or geodynamic studies rely on determining the preferred orientation of rock-forming minerals, either by direct texture determination or using anisotropy measurements as proxies. Robust interpretations of anisotropy require detailed understanding of its relationship with texture. This study investigates the texture, magnetic and seismic anisotropies of ultramafic rocks from the Ivrea-Verbano Zone (IVZ), Northern Italy, with a special focus on the interplay between anisotropy contributions carried by different minerals. Texture was obtained from electron backscatter diffraction, magnetic anisotropy from low- and high-field anisotropy of susceptibility measurements, and seismic anisotropy from P- and S-wave velocities along the three principal directions of the macroscopic fabric, using 22 mm diameter cores. Texture-based models of magnetic anisotropy agree well with corresponding measurements. Larger variability is observed for seismic anisotropy. Possible explanations are (1) velocities were measured in three directions, insufficient to determine the full elasticity tensor, and (2) seismic anisotropy depends on grain boundaries, pores, and cracks in addition to crystallographic preferred orientation. The contributions to magnetic and seismic anisotropy of each constituent mineral can interfere positively, leading to a larger overall anisotropy, or negatively, resulting in a weaker anisotropy. Seismic anisotropy is mostly controlled by olivine, whereas magnetic anisotropy can be dominated by olivine, pyroxene, or hornblende. This study illustrates that, although the relationship between texture and anisotropy can be complex, it is possible to quantitatively predict magnetic, and to a lesser degree seismic, anisotropy from texture data. Even though both magnetic and seismic anisotropies are common proxies for texture, they are not coaxial, and no simple relationship between the degree of magnetic and seismic anisotropy was found. These results underline the importance of understanding different minerals' contributions to anisotropy in upper mantle rocks.

Coercivity enhancement in sintered Nd-Fe-B magnets by large mass rotating diffusion with Tb strips

Rotating diffusion technology is especially suitable for mass production of small-sized magnets. In this paper, a large mass rotating diffusion with 2500 pieces of small-sized magnets was conducted to enhance coercivity. At the same time, the uniformity of the properties was studied. Taking both magnetic properties and yield rate into account, we obtained the optimal parameters of the rotating diffusion at 710 ℃ for 5 h, following a two-stage annealing process at 940 ℃ for 5 h and at 500 ℃ for 3 h. Thus, the coercivity of the magnet could increase from 14.05 kOe to 23.06 kOe. EPMA results show that most Tb enriches the surface of the magnets, and some Tb is diffused into the grain boundary phase forming magnetic isolation during the rotating diffusion process. After the two-stage annealing process, many (Nd,Tb)2Fe14B substitutional phases with higher anisotropy field are formed around the epitaxial layer of the main phase increasing the coercivity of the magnet. Discrete analysis and a linear fit show excellent uniformity of the properties in this massive rotating diffusion process.

The effect of Tb doping on the magnetic properties and microstructure of a TbNdFeCoB/Fe7Co3 nanocomposite permanent magnet

Melt-spun NdFeB-type nanocomposite magnetic materials are important in a number of applications, including electromagnetic sensors, magnetic resonance imaging, and voice coil motors. Herein we investigated the magnetic properties and microstructures of melt-spun TbxNd10−xFe80Co4B6/Fe7Co3 (x = 0.1, 0.2, and 0.3) ribbons by means of x-ray diffractometry, scanning electron microscopy, and magnetization experiments. Tb doping resulted in the formation of a 2:14:1 phase with a higher anisotropy field, which suppressed the separation of Fe7Co3 branch crystals and improved the magnetic properties of the material. Optimum magnetic properties that include a remanence (Jr) of 0.62 T, a coercivity (Hci) of 612.0 kA m−1, and a maximum magnetic energy product ((BH)max) of 94.9 kJ m−3 were obtained for the annealed Tb0.3Nd9.7Fe80Co4B6/Fe7Co3 ribbon. Furthermore, the effective anisotropy constant, and the saturation magnetization, in the nanocomposite were determined by the LATS (law of approach to saturation) method. In this study, the values of and were found to lie between those of hard and soft magnetic phases, consistent with the exchange-coupling concept.

Tuning magnetic properties, thermal stability and microstructure of NdFeB magnets with diffusing Pr-Zn films

Grain boundary diffusion process (GBDP) serves as a promising approach in improving magnetic properties and thermal stability of NdFeB permanent magnets. Herein, non-heavy rare earth Pr-Zn films deposited on the magnet surface using DC-magnetron sputtering system are reported. The thermal stability and coercivity enhancement mechanism of Pr-Zn GBDP magnets were investigated. Results show that the coercivity of Pr-Zn GBDP magnet increases from 963.96 kA m−1 to 1317.14 kA m−1 without any remanence reduction. Notably, the demagnetization curve of Pr-Zn GBDP magnet still remains a high squareness ratio. The temperature coefficient of coercivity and anti-demagnetization ability of Pr-Zn GBDP magnet under high temperatures are improved after GBDP treatment. The well-optimized rare earth-rich (RE-rich) grain boundary phases and high effective anisotropy field of (Nd,RE)2Fe14B magnetic hardening layers surrounding main grains are the key factors to impact the magnetic properties and thermal stability of NdFeB permanent magnets via GBDP treatment.

Magnetoelectric Interactions in Composites of Ferrite Films on Lattice-Matched Substrates and Ferroelectrics

The converse magnetoelectric effect (CME, $i.e.$ the magnetic response to a static electric field) in ferrite-ferroelectric composites is important for an innovative class of voltage-tunable, high-frequency magnetic devices. Technical challenges persist, though, due to weak CME coupling, large ferromagnetic-resonance (FMR) linewidth, and the need for a large bias magnetic field. This study aims to overcome those challenges by using single-crystal-like nickel ferrite films exhibiting high magnetostriction and narrow FMR linewidth. These films present a very high growth-induced magnetic anisotropy field that eliminates the need for a bias field, and facilitates device integration.

Large critical current density in Cu/Ag composite sheathed (Ba,K)Fe2As2 tapes fabricated under ambient pressure

Due to their high upper critical field (Hc2) and small anisotropy, iron-based superconductors have a great potential in high magnetic field applications. In this study, Cu/Ag composite sheathed (Ba,K)Fe2As2 (Ba-122) superconducting tapes were fabricated by an ex-situ powder-in-tube method. Moreover, an ambient pressure sintering process was adopted aiming at reducing the manufacturing cost and allowing for mass production. However, fabricating Cu/Ag composite sheathed Ba-122 tapes with a large transport Jc by an ambient pressure producing process is fairly challenging due to the absence of the over pressure. By optimizing sintering temperatures, sintering times and the composition of the raw materials, a transport Jc as high as 36 000 A cm−2 (4.2 K, 10 T) was obtained in tapes sintered at 740 °C for 3 h. The mechanism of the Jc improvement was systematically analyzed. This result is of great significance for the fabrication of low cost and long-length practical iron-based superconducting tapes.

Enhanced critical current density in BaFe2(As0.66P0.33)2 nanocomposite superconducting films

The high upper critical field and low anisotropy of the 122-type iron-based superconductor BaFe2As2 makes it promising for use in superconducting high field magnets. However, its critical current density (Jc) in high magnetic fields needs to be further improved. Here we show that for the film prepared by pulsed laser deposition method by controlling the deposition parameters (higher substrate temperature and lower growth rate), the crystallinity of BaFe2(As0.66P0.33)2 (Ba122:P) matrix is improved while maintaining a high density of incoherent BaZrO3 (BZO) nanoparticles (NPs) which together lead to significantly increased self field Jc. Our Ba122:P nanocomposite films also exhibit increased in-field Jc, reduced angular anisotropy of Jc and reduced detrimental effects of thermal fluctuations (creep rate) over a wide range of temperatures and magnetic field strength. The BZO NP doped Ba122:P films show high in-field Jc over 2.1 MA cm−2 even at 4 K and 9 T (μ0H∣∣c), which is significantly higher than that of standard Ba122:P films and conventional alloy superconducting wires. To understand the contribution of the various pinning centers, we applied a simple model, which was developed for cuprates, to Ba122:P film with all the parameters used derived by fitting to a limited set of experimental data (no free parameters) such that temperature, angle and field properties at other experimental conditions are then calculated. This simple model fits very well to the experimental results in these two very different material systems. We discuss the effectiveness of natural defect and BZO NPs on the ratio of Jc to the depairing current density. The superconducting properties for 122-type iron-based superconductors obtained through this work are considered promising for high-field applications.