Saturation Magnetostriction Research Articles

Piezomagnetic behavior of Fe–Al–B alloys

For the first time, the piezomagnetic behavior of polycrystalline Fe-Al-B alloys is accessed. Piezomagnetic factors of up to 4.0kAm−1/MPa were reached for an interval of applied compressive stresses between 0 and −140MPa. The experimental results together with a powerful multiscale and biphasic modeling allowed the general understanding of the magnetostrictive and piezomagnetic behaviors of these materials. The magnetic and mechanical localizations as well as homogeneous stresses were considered in the modeling and are associated to the intrinsic presence of the Fe2B phase. The interplay of the magnetocrystalline anisotropy, initial susceptibility, saturation magnetostriction and texture were quantified by the model and compared to the experimental results. An improvement of the piezomagnetic factor to 15kAm−1/MPa is predicted, for an alloy containing 20% of aluminum, by getting an adequate texture near 〈100〉 directions.

Cooperative nucleation modes in polycrystalline CoxPd1−x nanowires

Polycrystalline CoxPd1−x (x = 1, 0.60, 0.45, 0.23, and 0.11) cylindrical nanowires (ø = 18–35 nm, about 1 μm length) are produced by AC electrodeposition into hexagonally ordered alumina pores. Single-phase nanowires of an fcc Co-Pd solid solution, with randomly oriented equiaxed grains (7–12 nm) are obtained; in all the cases, the grain size is smaller than the wire diameter. The coercive field and the reduced remanence of Co-rich nanowire arrays are hardly sensitive to temperature within the range varying from 4 K to 300 K. On the other hand, in Pd-rich nanowires both magnitudes are smaller and they largely increase when cooling below 100 K. This behavior also depends on the mean grain size. These facts are systematized considering two main aspects: the non-trivial temperature and composition dependence of the crystalline anisotropy and the saturation magnetostriction in Co-Pd alloys; and a random anisotropy effect, which defines a nucleation localization length that may involve more than a single grain, and thus promotes more cooperative nucleation modes.

Structural, magnetic and magnetoelastic properties of Laves-phase Tb0.3Dy0.6Nd0.1(Fe1-xCox)1.93 compounds (0 ≤ x ≤ 0.40)

Structure, magnetization and magnetostriction of Tb0.3Dy0.6Nd0.1(Fe1-xCox)1.93 (0 ≤ x ≤ 0.40) compounds have been investigated. X-ray diffraction (XRD) analysis shows the presence of single Laves phase with a cubic MgCu2-type structure. The easy magnetization direction (EMD) is observed to be <111> direction when x ≤ 0.10, and deviates away with further increasing Co contents. The Co contributes an opposite role in the resultant magnetocrystalline-anisotropy compared to Tb. A small amount of Co substitution for Fe can enhance the Curie temperature for x ≤ 0.25. The magnetocrystalline-anisotropy compensation can be achieved in this system. A minimum in anisotropy is obtained for the Tb0.3Dy0.6Nd0.1(Fe0.8Co0.2)1.93 compound, which has good magneto-elastic properties, e.g., the large saturation magnetostriction λS (∼930 ppm) and the high low-field magnetostriction λa (∼670 ppm/3 kOe), and may make it technological interest in the field of magnetostrictive materials.

Optimization on magnetic anisotropy and magnetostriction in TbxHo0.8−xPr0.2(Fe0.8Co0.2)1.93 compounds

The structure, magnetocrystalline anisotropy compensation, magnetic properties, and magnetostriction of TbxHo0.8–xPr0.2(Fe0.8Co0.2)1.93 (0≤x≤0.30) polycrystalline alloys have been investigated. X-ray diffraction (XRD) analysis shows that all the alloys stabilize in the single Laves phase with a MgCu2-type cubic structure. The lattice parameter, Curie temperature and saturation magnetization monotonically increase with increasing Tb content. The easy magnetization direction (EMD) at room temperature is detected rotating from the <100> axis (x≤0.10) to the <111> axis (x≥0.15), accompanied by a rhombohedral distortion with large spontaneous magnetostriction coefficients λ111. The analysis of XRD, EMD and magnetostriction shows that TbxHo0.8–xPr0.2(Fe0.8Co0.2)1.93 is an anisotropy compensation system, and the critical compensation point is realized around x=0.15, which shifts to the Tb-poor side compared with the Pr-free counterpart. An optimized effect on magnetostriction especially at a relatively low field (λS~445ppm, λa~510ppm/3kOe) was obtained in Tb0.15Ho0.65Pr0.2(Fe0.8Co0.2)1.93 compound, which is much larger than that of the Pr-free counterpart Tb0.15Ho0.85(Fe0.8Co0.2)1.93 (λS~300ppm) and the Tb0.15Ho0.85Fe2 (λS~325ppm), due to the 20at% Pr introduction. Low content of heavy rare earth Tb, low anisotropy, high saturation magnetostriction and large low-field magnetostriction are obtained in Tb0.15Ho0.65Pr0.2(Fe0.8Co0.2)1.93 compound, which may make it a promising magnetostrictive material.

Induced magnetic anisotropy in Si-free nanocrystalline soft magnetic materials: A transmission x-ray diffraction study

In order to better understand the origin of field-induced anisotropy (Ku) in Si-free nanocrystalline soft magnetic alloys, the lattice spacing of the bcc-Fe phase in nanocrystalline Fe94−xNb6Bx (x = 10, 12, 14) alloys annealed under an applied magnetic field has been investigated by X-ray diffraction in transmission geometry (t-XRD) with the diffraction vector parallel and perpendicular to the field direction. The saturation magnetostriction (λs) of nanocrystalline Fe94−xNb6Bx was found to increase linearly with the volume fraction of the residual amorphous phase and is well described by taking into account the volume-weighted average of two local λs values for the bcc-Fe nanocrystallites (−5 ± 2 ppm) and the residual amorphous matrix (+8 ± 2 ppm). The lattice distortion required to produce the measured Ku values (∼100 J/m3) was estimated via the inverse magnetostrictive effect using the measured λs values and was compared to the lattice spacing estimations made by t-XRD. The lattice strain required to produce Ku under the magnetoelastic model was not observed by the t-XRD experiments and so the findings of this study suggest that the origin of magnetic field induced Ku cannot be explained through the magnetoelastic effect.

Effect of magnetic field annealing methods on soft magnetic properties for nanocrystalline (Fe0.5Co0.5)73.5Si13.5B9Nb3Cu1 alloy

The effect of magnetic field annealing methods on soft magnetic properties for nanocrystalline (Fe0.5Co0.5)73.5Si13.5B9Nb3Cu1 alloy was investigated. In contrast to nonmagnetic field annealing, the magnetic field annealing can obviously reduce saturation magnetostriction λs and increase effective magnetic anisotropy 〈K〉. Furthermore, the initial permeability μi of experimental samples can be enhanced significantly after magnetic field annealing. Different magnetic field annealing methods produced varying degrees of impact on the μi of samples, which is ascribed to the difference of obtained λs and 〈K〉. In three magnetic field annealing methods, the magnetic field nanocrystallization can manifest more effective magnetic field effect compared with other two magnetic field annealing methods and achieve more superior magnetic softness, the reason of which was also analyzed.

Magnetoelastic properties of Co-doped Laves compounds TbxHo0.9−xNd0.1Fe1.93 (0≤x≤0.40)

Structure, spin configuration, magnetocrystalline-anisotropy compensation, magnetization, and magnetostriction of TbxHo0.9-xNd0.1(Fe0.8Co0.2)(1.93) (0 axis when x >= 0.25, accompanied by a rhombohedral distortion with large spontaneous magnetostriction coefficients lambda(111). The anisotropy compensation can be achieved by evaluating EMD, magnetization and magnetostriction, and the critical point is realized to be around x = 0.25. The good magnetoelastic properties, e.g., the low anisotropy at room temperature, high polycrystalline saturation magnetostriction (lambda(s) similar to 560 ppm) and large spontaneous magnetostriction coefficient (lambda(111) similar to 850 ppm), are achieved for the Tb0.25Ho0.65Nd0.1 (Fe0.8Co0.2)(1.93) compound, which may make it a promising magnetostrictive material. (C) 2015 Elsevier Ltd. All rights reserved.

Magnetostriction and magnetization of 〈110〉 oriented Tb0.27Dy0.73Fe1.95 alloys with different compressive prestresses

〈110〉 oriented Tb0.27Dy0.73Fe1.95 alloys were studied under different applied compressive prestresses. Larger saturation magnetostriction by 500 × 10−6 is obtained for the sample under 5 MPa than that under no applied stress. To understand the effect of prestress on the magnetostrictive coefficient, differential magnetostrictive coefficient, relative permeability and coercive force were studied in detail. The results show that the maximum differential magnetostrictive coefficient is about 37 × 10−9 m·A−1, about two times that without stress. In addition, the saturation magnetostriction coefficient increases gradually with the stress increasing, while the maximum differential magnetostrictive coefficient decreases. The saturation inductions under different stresses are similar to a value of about 1.1 T. The relative permeability decreases with stress increasing.

Magnetostriction and complex permeability of [Fe62Co19Ga19/Py]5/glass multilayered films

[Fe62Co19Ga19(x)/Py(40–x)]5/glass multilayered films, where x=0, 5, 10, 15, 20nm, y=x(nm)/40(nm), and 0≤y≤1, were made by the magnetron sputtering method at room temperature. The total number of combined [Fe–Co–Ga/Py] unit-layers was five. The total film thickness (tf) was fixed at 200nm. We have performed two kinds of experiments on these films: (i) the saturation magnetostriction (λS) measurement, and (ii) the complex permeability (μ=μR–jμI) experiment to find the resonance frequency (fR) as a function of external magnetic field (HE). By definition, the microwave power absorption Pabs at ferromagnetic resonance (FMR) for a metallic conductor is written as Pabs=[(μR2+μI2)1/2+μI]1/2. We define the half-width of the absorption peak Δf as Δf ≣ ΔfS+ΔfA, where ΔfS and ΔfA are the symmetric and asymmetric parts in Δf. The degree of asymmetry, ΔfA/Δf, of each absorption peak is associated with the structural and/or magnetic inhomogeneity in the film. The main findings from this study are summarized as follows: (A) maximum λS occurs in the y=1 film, and as y increases, λS increases; (B) biasing field for magnetostriction decreases greatly by adding Py layers; (C) the magnetostriction sensitivity remains almost constant in the range 0.4<y ≦ 1; (D) μR increases, as y decreases. Thus, from this study we conclude that among all the [Fe62Co19Ga19/Py]5/glass films, the [Fe62Co19Ga19(30)/Py(10)]5/glass film should be the most suitable for applications in nano-magnetic switching devices.

Microstructure and magnetostrictive behavior of Fe-15 at% Ga alloy with different cooling rates

The main attention of this paper was devoted to the study of the effect of different cooling rates on the magnetic domain configuration and magnetostrictive behavior of heat-treated Fe-15 at% Ga alloy. After annealing at 1,000 °C for 3 h, the samples were subjected to water quenching, air cooling, and furnace cooling treatments. Phase constitution and magnetic domain structures of the samples were studied using X-ray diffraction (XRD) and magnetic force microscopy (MFM). XRD results indicate a single phase of α-Fe with disordered bcc (A2) structure for all samples. MFM results show that both water-quenched (WQ) and air-cooled (AC) samples are mainly made from ordered stripe domain structures, whereas a mixture of irregular stripe, zigzag, and plate domain patterns are observed in furnace-cooled (FC) sample. Magnetostrictive strain was measured in the presence of an externally applied magnetic field. It is found that WQ sample has the highest magnetostriction, while AC and FC samples exhibit moderate and the lowest magnetostriction, respectively, against the applied field. The dependence of initial domain configurations on thermal history is found to be conducive to the change in saturation magnetostrictions of the samples.

Amorphous FeNiCoCuSiBCr Alloys with Superior Direct Current Tolerant Characteristics

Amorphous Fe62-x Ni19Cox Cu0.1 Si3.8 B14 Cr1.1 (x = 0, 1, 5, 10) ribbons were annealed under magnetic field and tensile stress, respectively, and their magnetic properties were investigated. Fe73.5 Cu1 Nb3 Si15.5 B7 and Fe66 Ni10-Cu1 Nb3 Si11 B9 nanocrystalline alloy ribbons were also fabricated for comparison. Excellent DC tolerant property was obtained in the amorphous FeNiCoCuSiBCr ribbons after thermomagnetic treatment and the constant permeable property was improved with increasing Co content. The relative permeability was constant up to the DC bias field of approximately 6 × 10−4, 9 × 10−4, and 10 × 10−4 T and the values of relative permeability μr were 1650, 1200, and 1000 with the Co content being 0, 5 at. %, and 10 at. %, respectively. Besides, stress-annealed FeNiCoCuSiBCr alloy ribbons were proved to exhibit positive saturation magnetostriction constant λs.

Structural and magnetic properties of Sn and Ti doped Co ferrite

We submit the report on the structural and magnetic studies of Sn and Ti doped cobalt ferrite materials in comparison with the pure CoFe2O4. The XRD result confirms the inverse spinel crystallization of the samples with a space group of Fd-3m. The homogeneity and the stoichiometry of the samples were confirmed with the help of energy dispersive X-ray analysis (EDS). The Raman spectra gave the peaks corresponding to the tetrahedral and octahedral groups. In the case of Sn doping, the right shift of the peaks indicate the presence of massive Sn4+ ion. The effect of the doping of the diamagnetic ions (Ti4+ and Sn4+) is well seen from the reduction of saturation magnetization value from 80emu/g to 66emu/g and 61emu/g respectively. Anisotropy constant (K1) values of all the compounds were calculated employing law of approach method. Values of K1 is found to be 2.16, 1.60 and 1.93×106erg/cm3 for pure Co ferrite, Sn doped and Ti doped Co ferrites respectively. Saturation magnetostriction (λs) value of pure Co ferrite, Sn doped and Ti doped Co ferrites are −108×10−6, −115×10−6 and −182×10−6 respectively. Considerable enhancement in saturation magnetostriction was observed in the Ti doped Co ferrite. The variation of dλ/dH with applied magnetic field is seen to be less for all the samples, due to the larger crystalline anisotropy of Co2+ ions.

Magnetic, magnetostrictive, and AC impedance properties of manganese substituted cobalt ferrites

In this study, we investigated the effects of substituting Mn3+ for some Fe3+ in spinel lattice on the structure, magnetic properties, magnetostriction behavior, and AC impedance characteristics of cobalt ferrites. The manganese substituted cobalt ferrites (Co–Mn ferrites), CoMnxFe2−xO4, with x varied from 0 to 0.3 in 0.1 increments, were prepared by solid-state reaction. XRD examination confirmed that all sintered Co-based ferrites had a single-phase spinel structure. The average grain size, obtained from SEM micrographs, increased from 8.2μm to 12.5μm as the Mn content (x) increased from 0 to 0.3. Both the Curie temperature and coercivity of Co-based ferrites decreased with greater amounts of Mn, while the maximum magnetization (at H=6kOe) of Mn-substituted cobalt ferrites was larger than that of the pure Co-ferrite. Magnetostrictive properties revealed that the pure Co-ferrite had the largest saturation magnetostriction (λS), about −167ppm, and the CoMn0.2Fe1.8O4 sample exhibited the highest strain sensitivity (|dλ⊥/dH|m) of 2.23×10−9A−1m among all as-prepared Co-based ferrites. In addition, AC impedance spectra analysis revealed that the real part (Z′) of the complex impedance of Co–Mn ferrites was lower than that of pure Co-ferrite in the low frequency region, and the Co-based ferrites exhibited semiconductor-like behavior.

Erratum to: Fe73.5Cu1Nb3 Si 15.5B7 Thin Films Deposited by HiPIMS: Magnetic and Magnetostrictive Behavior

Results concerning the magnetic, magnetostrictive, structural, morphological, and topological properties of amorphous and nanocrystalline Fe 73.5Cu 1Nb 3Si 15.5 B 7 thin films deposited using the high power impulse magnetron sputtering (HiPIMS) technique are reported. In as-deposited state, the samples are amorphous, the nanocrystalline state being achieved for samples isothermally annealed at adequate temperatures, in an electric furnace. For the optimum annealing temperature (475 ∘C), a decrease by about 70 % for the coercive magnetic field (50 A/m) and up to 1 order of magnitude for the saturation magnetostriction (~1×10−6), compared to the as-deposited state, was obtained. The X-ray diffractometry (XRD) and scanning electron microscopy (SEM) results for samples thermally treated at 475 ∘C revealed a 53.6 % crystalline volume fraction of α-Fe(Si) nanograins with an average size of about 15 nm and a Si content of 10.78 %, uniformly dispersed in a residual amorphous matrix. Using the saturation magnetostriction values determined using the cantilever deflection method and the crystalline volume fraction of α-Fe(Si) nanograins, the contribution of crystalline phase to the saturation magnetostriction was also determined.

Relationship Between Output of a Fluxgate Sensor and Magnetization Process of Its Core

Motivated by the need to miniaturize fluxgate sensors, we investigated the dependence of the sensitivity of fluxgate sensors on the saturation flux density and magnetostriction of an amorphous ribbon core. In addition, the relationship between the sensing properties and the magnetization process of its core was investigated with a Kerr microscope. We found that the sensitivity decreased with an increase in magnetostriction. Highly magnetostrictive amorphous ribbons exhibited maze domains that were difficult to move by applying a low magnetic field of a few hundred amperes per meter. This effect caused a decrease in the sensitivity of the sensors.

Large magnetostriction and direct experimental evidence for anisotropy compensation in Tb0.4−xNdxDy0.6(Fe0.8Co0.2)1.93 Laves compounds

Structure, spin configuration and magnetostriction of Tb0.4−xNdxDy0.6(Fe0.8Co0.2)1.93 (0≤x≤0.30) compounds are investigated. A single-phase Laves phase is synthesized at equilibrium conditions at ambient pressure for the indicated Nd-concentration range. Direct experimental evidence for magnetocrystalline-anisotropy compensation between Tb3+ and Nd3+ is obtained by performing X-ray diffraction on magnetic-field aligned powders and by evaluating the easy magnetization direction and the magnetostriction. A large polycrystalline saturation magnetostriction λS (~1170ppm) is observed for x=0.05, which can be attributed to the large magnetostriction coefficients λ111 (~1600ppm) and λ100 (~520ppm). The compound Tb0.35Nd0.05Dy0.6(Fe0.8Co0.2)1.93 with large magnetostriction and low anisotropy is found to be a good candidate material for magnetostriction applications.

Experimental determination of magnetocrystalline anisotropy constants and saturation magnetostriction constants of NiZn and NiZnCo ferrites intended to be used for antennas miniaturization

Abstract This study investigates the magnetocrystalline anisotropy constants (K 1 ) and the saturation magnetostriction constants ( λ S ) of Ni 1− x Zn x Fe 2 O 4 (NiZn) and Ni 0.8− x Zn x Co 0.2 Fe 1.98 O 4−δ (NiZnCo) ferrites intended to be used for antenna downsizing. Composite materials constituted of soft ferrite nanosized particles (NiZn or NiZnCo ferrites) embedded in an epoxy matrix are realized. Measurements of their magnetic permeability in the frequency range of 200 MHz–6 GHz are performed. The influence of compressive stress (in the range of 32–96 MPa) on their Ferrimagnetic Resonance (FMR) is demonstrated. An analytical modeling of stress-induced FMR changes is proposed that allows simultaneous determinations of the Natural Ferrimagnetic Resonance (NFMR, F 0 ), K 1 and λ S of Ni 1− x Zn x Fe 2 O 4 and Ni 0.8− x Zn x Co 0.2 Fe 1.98 O 4−δ ferrites. The obtained results for NiZn ferrites are in agreement with literature data, validating both the experimental process and the proposed modeling of the stress-induced FMR changes. Regarding NiZnCo ferrites, extended data on K 1 and λ S are presented for the first time. Increasing zinc content (x) induces a spin disorder that reduces in a same time K 1 and the magnetization at saturation M S . The rapid variation of K 1 (x) is related to that of the magnetization M S (x) through a power law. The single-ion anisotropy model allows a satisfactory interpretation of K 1 dependence on zinc content. The unexpected low values of λ S got for NiZnCo ferrites, compared to those got for NiZn ferrites, are also discussed. Application of compressive stress lowers noticeably magnetic losses of Ni 0.6 Zn 0.2 Co 0.2 Fe 1.98 O 4−δ at given frequency, thereby enhancing the ability of this spinel ferrite to be used as a substrate in the aim of antenna miniaturization.

Effect of Ti on glass-forming ability and magnetic properties of Fe81Si4B12−x P2Cu1Ti x (x = 0–3) soft magnetic alloys

The effect of Ti substitution for B on the glass-forming ability, microstructure and soft magnetic properties of Fe81Si4B12−x P2Cu1Ti x (x = 0–3) alloy ribbons made by single roller melt spinning method were investigated. The experimental results demonstrate that proper doping of Ti effectively improves the glass-forming ability, widening the optimum annealing temperature range, decreasing the sensitivity of coercivity on annealing temperature, increasing the volume fraction of nanocrystalline α-Fe phase and suppressing the grain growth in this alloy system. For alloy ribbons Fe81Si4B12−x P2Cu1Ti x (x = 0.5–2.5) annealed at 475 °C for 5 min, the saturation magnetostriction λ s and the magnetic flux density B 8000 gradually decrease with increasing x, while the coercivity H c decreases with increasing x until x = 2.0 and then increases. Nanocrystalline alloy Fe81Si4B10P2Cu1Ti2 shows excellent magnetic properties with low λ s of 7 ppm, low H c of 7.5 A/m and high B 8000 of 1.73 T which is promising for the future industrial applications.

Microstructures and Magnetic Properties of Fe70−x Pd30Ni x High-Temperature Ferromagnetic Shape Memory Alloys

This research paper mainly presents an investigation of the microstructures and magnetic properties of bulk ferromagnetic shape memory (FSM) Fe70−x Pd30Ni x (Ni x = 4, 8 at.%) alloys, by transmission electron microscopy (TEM), a magnetostrictive-meter setup, and a superconducting quantum interference device (SQUID) magnetometer. The FSM alloys were homogenized through hot and cold strain forging (SF) to a ∼38 % reduction in thickness, solution-treated (ST) with annealing recrystallization at 1100 °C or 8 h, quenched in ice brine, and then aged at 500 °C for 100 h (5 HTA). The investigation of the microstructures and magnetic properties indicated that the higher Ni content (N x = 8 at.%) in the Fe62Pd30Ni8 alloy SF and ST reduced the saturation magnetostriction at RT. However, with higher Ni content in the Fe62Pd30Ni8 alloy, the decomposition of L10 + L1m twin phases into stoichiometric L10 + L1m + α bct structures was suppressed after the alloy was ST and aged at 5 HTA, as confirmed by TEM investigation. The result was that the FSM Fe62Pd30Ni8 alloy maintained a high saturation magnetostriction and magnetization after the alloy was ST and aged at 5 HTA. This magnetic property of the Fe62Pd30Ni8 FSM alloy makes it suitable for application in high-temperature (T < 500 °C) and high-frequency environments. However, low Ni content FSM Fe66Pd30Ni4 (N x = 4 at.%) alloy SF, ST, and aged at 5 HTA underwent decomposition of the L10 + L1m twin phases into the stoichiometric L10 + L1m + α bct structures, as confirmed by TEM, leading to a decrease of saturation magnetostriction and magnetization. This magnetic property of the Fe66Pd30Ni4 FSM alloy is not suitable for application in high-temperature (T < 500 °C) environments.

Structural, magnetic and magnetostrictive properties of Laves-phase compounds TbxHo0.9−xNd0.1Fe1.93 (0 ≤ x ≤ 0.40)

The structural, magnetic and magnetostrictive properties of TbxHo0.9−xNd0.1Fe1.93 (0 ≤ x ≤ 0.40) alloys have been investigated by means of X-ray diffraction (XRD), a vibrating sample magnetometer and a standard strain technique. Single Laves phase (Tb,Ho,Nd)Fe2 compounds with a cubic MgCu2-type structure have been synthesized at equilibrium conditions with ambient pressure. The lattice parameter of the Laves phase increases linearly with increasing Tb content and obeys the linear Vegard's law. The easy magnetization direction (EMD) at room temperature rotates continuously from <100> for x = 0.10 to <111> for x = 0.25 through an intermediate direction <110> around x = 0.15, subjected to the anisotropy compensation between Tb3+ and Ho3+ ions. The splitting of (440) XRD peak accompanied by the spontaneous magnetostriction-induced rhombohedral distortion is observed for the compounds of x ≥ 0.2, and the spontaneous magnetostriction coefficient λ111 is found to increase with increasing Tb content. The analysis of XRD, EMD, magnetization and magnetostriction shows that the pseudobinary system TbxHo0.9−xNd0.1Fe1.93 is an anisotropy compensation system and the compensation point is realized around x = 0.25. The Nd-containing Tb0.25Ho0.65Nd0.1Fe1.93 Laves-phase compound has good magnetostrictive properties, that is, a large saturation magnetostriction (λS∼585 ppm) and a low magnetocrystalline anisotropy at room temperature, which may make it technological interest for magnetostriction applications.