Canted Antiferromagnetic Spin Research Articles

Unconventional anomalous Hall effect and large anomalous Nernst effect in antiferromagnet SmMnBi2

The anomalous Hall effect (AHE) and its thermoelectric counterpart, the anomalous Nernst effect (ANE), are two transverse transport coefficients that are intensely studied in condensed matter physics. While conventional wisdom links AHE and ANE to ferromagnetism, recent achievements reveal that they can emerge in nonmagnetic and antiferromagnetic topological materials with a diversity of mechanisms—many of which await further elucidation. Here, both an unconventional AHE (UAHE) that does not scale with the magnetization and a sizable ANE ( ≈ 1.8 μV K−1) are shown to be possessed by the metallic tetragonal antiferromagnet SmMnBi2. Electronic band structure of SmMnBi2 is investigated by angle-resolved photoemission spectroscopy and first-principles calculations. It is demonstrated that the UAHE reflects the intrinsic Berry curvature contribution stemming from the spin-canted antiferromagnetism, whereas the ANE is possibly further amplified by extrinsic mechanisms. These results identify SmMnBi2 as a promising candidate for exploring unusual transverse transport effects and the extremely rich underlying physics.

Spin canting and slow magnetic relaxation in mononuclear cobalt(II) sulfadiazine ternary complexes.

Monomeric [Co(SDZ)2phen] (1) and [Co(SDZ)(bq)Cl] (2) complexes (SDZ = sulfadiazine, phen = 1,10-phenanthroline, and bq = 2,2'-biquinoline) have been synthesized and characterized. X-ray diffraction studies indicate that SDZ acts as a bidentate ligand coordinating through the sulfonamide and the pyrimidine N atoms in both compounds. In complex 1, the coordination sphere consists of two SDZ ligands and a bis-chelating phen ligand, giving rise to a CoN6 coordination sphere. On the other hand, 2 has a CoN4Cl core, with two N-atoms from SDZ and two from the bq ligand. Both compounds have been studied by dc and ac magnetometry and shown to display slow magnetic relaxation under an optimum external dc field (1 kOe) at low temperatures. Moreover, compound 2 displays long range magnetic ordering provided by spin-canted antiferromagnetism, which has been characterized by further field-dependent magnetic susceptibility measurements, FC/ZFC curves, hysteresis loops and frequency-independent ac curves. The signs of the calculated D parameters, positive in 1 and negative in 2, have been rationalized according to the two lowest-lying transitions in the orbital energy diagrams derived from ab initio ligand field theory (AILFT). In a subsequent attempt to reveal the possible hidden zero-field SMM behaviour, Ni(II)-based 3 and Co(II)-doped Ni(II)-based (with a Ni : Co ratio of 0.9 : 0.1) heterometallic compound 2Ni were synthesized.

Thermoremanent magnetization and Raman study in weak ferromagnet FeBO3

In the past decade, there has been a lot of interest in exploring the magnetization dynamics in spin canted antiferromagnet for their possible useful role in the areas of antiferromagnetic spintronics. The canted spin structure in such antiferromagnets arises through the Dzyaloshinskii–Moriya interaction. In this work, we present our results on the magnetization, thermoremanent magnetization and temperature dependent Raman studies in such a room temperature canted antiferromagnet FeBO3. The measurement of thermoremanent magnetization with time brings out the time-stable character of remanence. Furthermore, the time-stable remanence varies in a very unusual way with the (cooling) magnetic field used to prepare the remanent state. Temperature variation of Raman spectra in the vicinity of Neel temperature, TN∼ 348 K, brings out anomalies in the vibrational modes. The present study shows that FeBO3 can have technological importance particularly in the areas of antiferromagnetic/weak ferromagnetic spintronics.

Cuprate Oxyfluorides La2Cu0.8Ni0.2O3F2 and La2CuO3F2 with "Channel-like" Anion Ordering.

Highly fluorinated cuprate Ruddlesden-Popper oxyfluorides La2Cu0.8Ni0.2O3F2 and La2CuO3F2 were obtained by topochemical reaction between poly(vinylidene fluoride) (PVDF) and the corresponding oxides La2Cu0.8Ni0.2O4 and La2CuO4 prepared by citrate-based soft chemistry synthesis. The crystal structures of both oxyfluorides were investigated by powder diffraction techniques. The structure of La2Cu0.8Ni0.2O3F2 was solved based on combined neutron and X-ray powder diffraction. It crystallizes in a new monoclinic distorted version [C2/c a = 13.1880(3) Å, b = 5.7244(1) Å, c = 5.6007(1) Å, and β = 90.85(1)°] of the anionic ordered structure lately reported for La2NiO3F2. For La2CuO3F2, an even less symmetrical triclinic structure was derived from X-ray powder diffraction data [P1̅ a = 5.6180(5) Å, b = 5.7316(6) Å, c = 7.1978(9) Å, α = 113.32(1)°, β = 90.89(9)°, and γ = 90.16(11)°]. For both compounds, an additional tilt component of the partially Jahn-Teller elongated (Cu,Ni)O4F2 octahedra was found as the origin for the lowered symmetry. The formation reaction of La2CuO3F2 was studied by in situ XRD measurements. In these investigations, two new reaction intermediates were identified. The magnetic properties of both oxyfluorides La2Cu0.8Ni0.2O3F2 and La2CuO3F2 were characterized by field- and temperature-dependent measurements. An antiferromagnetic ordering with TN = 240 K was found for La2Cu0.8Ni0.2O3F2. In La2CuO3F2, additional weak ferrimagnetism was observed, resulting in a pronounced hysteresis but a weak saturation moment, which was attributed to result from a canted antiferromagnetic spin arrangement.

Interplay of lattice, spin, and dipolar properties in CoTeMoO6 : Emergence of Griffiths-like phase, metamagnetic transition, and magnetodielectric effect

The physical properties of the noncentrosymmetric and quasi-two-dimensional canted antiferromagnetic material ${\mathrm{CoTeMoO}}_{6}$ (CTMO) are studied. We unravel a spectrum of intriguing phenomena, including a correlated short-range-ordered Griffiths-like phase near ${T}_{G}\ensuremath{\sim}64\phantom{\rule{0.16em}{0ex}}\mathrm{K}$, a sharp step-like metamagnetic behavior of isothermal magnetization induced by a spin-flop transition at a critical magnetic field ${H}_{\mathrm{c}}\ensuremath{\sim}1.2\phantom{\rule{0.16em}{0ex}}\mathrm{T}$, a strong dielectric anomaly, a pronounced magnetodielectric effect, and the associated weak magnetoelectric coupling at its magnetic transition temperature, ${T}_{N}\ensuremath{\sim}23.4\phantom{\rule{0.16em}{0ex}}\mathrm{K}$. The crucial roles played by spin canting in CTMO are revealed in the aforementioned strongly entangled behavior of the spin and dipolar order parameters. The observed magnetostriction effect coupled with spin-phonon coupling seems to be a key factor in influencing the observed magnetodielectric effect. In addition, our theoretical first-principles calculations predict an insulating state with a canted antiferromagnetic spin configuration that matches well with the experimental results.

Magnetic coupling and spin ordering in bisdithiazolyl, thiaselenazolyl, and bisdiselenazolyl molecular materials.

The use of purely organic materials is a promising approach for the miniaturization of devices due to their interesting optical, electronic and magnetic properties. Bisdithiazolyl-based bisDTA compounds have emerged as promising candidates for radical-based single component conductors exhibiting simultaneously magnetic properties. Our computational work focuses on the intriguing magnetism of 4 isostructural pyridine-bridged bisDTA-multifunctional materials triggered by their magnetic and conducting properties being strongly dependent on the different S/Se ratios in the neutral radical skeleton: specifically, bisdithiazolyl (S,S) displays no magnetic order at low temperatures, thiaselenazolyl (Se,S) exhibits spin-canted antiferromagnetism (AFM), and both (S,Se) and bisdiselenazolyl (Se,Se) behave as bulk ferromagnets (FM). Our results reveal that (1) the magnetic response depends on the existence of an intricate network of both AFM and FM spin exchange JAB couplings between neighbouring radicals; and (2) the structural arrangement of π-stacked pairs of radicals sits on a point in the configurational space that is very close to a crossover region where JAB switches from AFM to FM. Indeed, for bulk FM, the experimental response is only accounted for when considering an ab initio optimised crystal structure able to portray adequately the electronic structure of bisDTAs in the region close to the temperature at which magnetic ordering emerges. Magneto-structural correlation maps show the large sensitivity of JAB to very small structural changes with temperature along the π-stacks that lead to drastic changes in the magnetic properties. Clearly, the understanding of magnetism in the title bisDTA compounds is decisive to rationally tailor the properties of multifunctional materials by subtle structural modifications of their crystal packing.

Magnetism in quasi-two-dimensional tri-layer La2.1Sr1.9Mn3O10 manganite

The tri-layer La_{3-3x}Sr_{1+3x}Mn_{3}O_{10} manganites of Ruddlesden–Popper (RP) series are naturally arranged layered structure with alternate stacking of ω-MnO_2 (ω = 3) planes and rock-salt type block layers (La, Sr)_2O_2 along c-axis. The dimensionality of the RP series manganites depends on the number of perovskite layers and significantly affects the magnetic and transport properties of the system. Generally, when a ferromagnetic material undergoes a magnetic phase transition from ferromagnetic to paramagnetic state, the magnetic moment of the system becomes zero above the transition temperature (T _{C} ). However, the tri-layer La_{2.1}Sr_{1.9}Mn_{3}O_{10} shows non-zero magnetic moment above T _{C} and also another transition at higher temperature T ^{*} approx 263 K. The non-zero magnetization above T _{C} emphasizes that the phase transition in tri-layer La_{2.1}Sr_{1.9}Mn_{3}O_{10} not a ferromagnetic to paramagnetic state. We show here the non-zero magnetic moment above T _{C} is due to the quasi-two-dimensional nature of the tri-layer La_{2.1}Sr_{1.9}Mn_{3}O_{10} manganite. The scaling of the magnetic entropy change confirms the second-order phase transition and the critical behavior of phase transition has been studied around T_C to understand the low dimensional magnetism in tri-layer La_{2.1}Sr_{1.9}Mn_{3}O_{10}. We have obtained the critical exponents for tri-layer La_{2.1}Sr_{1.9}Mn_{3}O_{10}, which belong to the short-range two-dimensional (2D)-Ising universality class. The low dimensional magnetism in tri-layer La_{2.1}Sr_{1.9}Mn_{3}O_{10} manganite is also explained with the help of renormalization group theoretical approach for short-range 2D-Ising systems. It has been shown that the layered structure of tri-layer La_{2.1}Sr_{1.9}Mn_{3}O_{10} results in three different types of interactions intra-planer ( J_{ab} ), intra-tri-layer ( J_{c} ) and inter-tri-layer ( J' ) such that J_{ab}> J_{c}>> J' and competition among these give rise to the canted antiferromagnetic spin structure above T _{C} . Based on the similar magnetic interaction in bi-layer manganite, we propose that the tri-layer La_{2.1}Sr_{1.9}Mn_{3}O_{10} should be able to host the skyrmion below T _{C} due to its strong anisotropy and layered structure.

Coexistence of Spin Canting and Metamagnetism in a One-Dimensional Mn(II) Compound Bridged by Alternating Double End-to-End and Double End-On Azido Ligands and the Analog Co(II) Compound

Two new compounds of general formula [M(N3)2(dmbpy)] in which dmbpy = 5,5′-dimethyl-2,2′-bipyridine, and M = Mn(II) or Co(II), have been solvothermally synthesized and characterized structurally and magnetically. The structures consist of zig-zag polymeric chains with alternating bis-µ(azide-N1)2M and bis-µ(azide-N1,N3)2M units in which the cis-octahedrally based coordination geometry is completed by the N,N’-chelating ligand dmbpy. The molecular structures are basically the same for each metal. The Mn(II) compound has a slightly different packing mode compared to the Co(II) compound, resulting from their different space groups. Interestingly, relatively weak interchain interactions are present in both compounds and this originates from π–π stacking between the dmbpy rings. The magnetic properties of both compounds have been investigated down to 2 K. The measurements indicate that the manganese compound shows spin-canted antiferromagnetic ordering with a Néel temperature of TN = 3.4 K and further, a field-induced magnetic transition of metamagnetism at temperatures below the TN. This finding affords the first example of an 1D Mn(II) compound with alternating double end-on (EO) and double end-to-end (EE) azido-bridged ligands, showing the coexistence of spin canting and metamagnetism. The cobalt compound shows a weak ferromagnetism resulting from a spin-canted antiferromagnetism and long-range magnetic ordering with a critical temperature, TC = 16.2 K.

Successive magnetic ordering in two CoII-ladder metal-organic frameworks

Metal-organic frameworks showing successive magnetic ordering are far less common than inorganic compounds. Here, we report two metal-organic frameworks [CoII(ox)(bphy)•0.1(DMF)•0.1(MeOH)] n ( 1 ) and [CoII3(ox)3(bphy)2(DMF)2] n ( 2 ) comprised of zigzag and necklace CoII-ladders, respectively. Together with a previously reported compound [CoII(ox)(bphy)•0.2(DMF)] n ( 3 ) consisting of spiraling zigzag CoII-ladders, these three compounds provide a good system for comparative structural and magnetic studies. Comprehensive magnetic analysis reveals that the three compounds undergo long-range magnetic ordering at ~2.6 K but exhibit vastly different short-range magnetic correlations: compound 1 shows short-range spin-canted antiferromagnetism ordering at ~14.0 K; compound 2 demonstrates successive short-range antiferromagnetism ordering at ~15.5 and ~12.6 K; compound 3 shows slow magnetic relaxation with T b≈ 4.6 K. These results demonstrate long-range magnetic ordering is readily accessible in the frameworks of ox2− bridging CoII-ladders linked by bphy, where short-range magnetic correlations can be systematicly tuned by the CoII-ladder structures.

Sodium Transition Metal Vanadates from Hydrothermal Brines: Synthesis and Characterization of NaMn4(VO4)3, Na2Mn3(VO4)3, and Na2Co3(VO4)2(OH)2

Three new examples of transition metal vanadates have all been synthesized by a related hydrothermal synthetic route using variations of sodium hydroxide/sodium chloride brines as mineralizers. Compound 1, NaMn4(VO4)3, is built from equivalent interlocking chains of Mn2+ edge shared octahedra, further coordinated to one another by (VO4)3– vanadate groups to form a three‐dimensional structure. Compound 2, Na2Mn3(VO4)3, forms a complex three‐dimensional structure of mixed‐valence 2+/3+ manganese edge‐sharing octahedra forming chains, with (VO4)3– tetrahedra acting as space‐fillers in the structure. Structure 3, Na2Co3(VO4)2(OH)2, is built of a two‐dimensional distorted honeycomb of edge shared Co2+ layers decorated by, but not connected by, vanadate groups. The layers bear a relationship to Kagome nets but the structure contains no ideal trigonal symmetry. All compounds were characterized by single‐crystal X‐ray diffraction. Compounds 1 and 3 were characterized by magnetic susceptibility. The magnetic susceptibility of 1 displays the moment characteristic of Mn2+ and a transition at 46 K to a spin canted antiferromagnet. Compound 3 shows evidence of spin–orbit coupling in the Co2+ ions with antiferromagnetic ordering at 4.4.K and highly anisotropic field‐dependent behavior with multiple metamagnetic transitions.

Tuning of structural phase, magnetic spin order and electrical conductivity in mechanical alloyed material of α-Fe2O3 and α-Cr2O3 oxides

The solid solution of Fe2-xCrxO3 (x = 0.2–0.8) has been prepared by mechanical alloying of α-Fe2O3 and α-Cr2O3 oxides and subsequent heat treatment. The lattice structure and properties of the heat treated samples differed from the as-alloyed samples. High quality synchrotron X-ray diffraction patterns have shown an inhomogeneous structure of α-Fe2O3 and α-Cr2O3 phases in as-alloyed samples. The heat treatment has homogenized structure and successfully incorporated the Cr atoms into lattice sites of the Fe atoms in α-Fe2O3. The soft ferromagnetic properties with signature of two Morin transitions have been observed in the as-alloyed samples. A canted antiferromagnetic spin order has appeared in the heat treated samples, irrespective of Cr content in Fe2-xCrxO3. The spin flop transition has been observed at a critical magnetic field that depends on Cr content in the system. The Mössbauer spectra at room temperature have suggested a non-uniform distribution of magnetic spin order of Fe and Cr ions in rhombohedral structure. The electrical conductivity of the heat treated samples has shown enhancement with the increase of Cr content in α-Fe2O3 structure.

Reversible Dynamic Structural Transformation between 3D and 1D Cd–Co Heterometallic MOFs Showing Switchable Spin-Canted Antiferromagnetism

Two Cd-Co heterometallic frameworks based on the ligand methylenesuccinate acid (H2MSA), three-dimensional (3D) [CdCo6(MSA)6(μ3-OH)2(H2O)2]·H2O (1) and one-dimensional (1D) [CdCo(MSA)2(H2O)5]·3H2O ...

B-site disorder driven multiple-magnetic phases: Griffiths phase, re-entrant cluster glass, and exchange bias in Pr2CoFeO6

The magnetic spin ordering and the magnetization dynamics of a double perovskite Pr2CoFeO6 have been investigated by employing the (dc and ac) magnetization and neutron powder diffraction techniques. The study revealed that Pr2CoFeO6 adopted a B-site disordered orthorhombic structure (Pnma). Furthermore, ab initio band structure calculations suggested an insulating antiferromagnetic ground state. Magnetization measurements revealed that the system possesses a spectrum of competing magnetic phases, viz., long range canted antiferromagnetic (AFM) spin ordering (TN ∼ 269 K), Griffiths-like phase, re-entrant cluster glass (TG ∼ 34 K), and exchange bias effects. The neutron diffraction study divulged the exhibition of a long range G-type of canted AFM spin ordering. The random nonmagnetic dilution of magnetic Fe3+ (high spin) ions by Co3+ (low spin) ions due to B-site disorder essentially played a crucial role in manifesting such magnetic properties of the system.

Three New Niccolites: High-Temperature Phase Transitions, Prominent Anisotropic Thermal Expansions, Dielectric Anomalies, and Magnetism.

Three new iso-structural ammonium metal formates of [dmpnH2 ][M2 (HCOO)6 ], in which dmpnH2 2+ =N,N'-dimethyl-1,3-propylenediammoium and M=divalent Co, Zn and Mg ions, are reported. They possess niccolite metal formate frameworks with long-shaped cavities for the accommodation of dmpnH2 2+ cations. The three materials display reversible phase transitions of similar mechanism from ordered, antipolar or antiferroelectric, low-temperature phases in space group C2/c, to disordered, paraelectric, high-temperature phases in space group P 1c, with quite high critical temperatures of 366, 370, and 334 K for Co, Zn, and Mg members, respectively. On warming, the dmpnH2 2+ cation experiences an ordered state with gradual increase of the local vibration motions of the central CH2 and terminal CH3 groups, a partially disordered state with gradually enhanced flipping motion between the major and minor orientations, and finally a twisting or rotating motion after the phase transition, accompanied by prominent anisotropic thermal expansions and dielectric anomalies/relaxations. The phase transition characters and relevant properties also exhibit a subtle metal-dependence. The Co member shows spin-canted antiferromagnetism below the Néel temperature of 16.1 K, with unusual large spontaneous magnetization and coercive field.

Realization of spin-canted magnetism from lattice site specific spin structure in the double perovskite Nd2CoTiO6

Abstract The magnetic, dielectric and structural properties of a double perovskite oxide Nd2CoTiO6 (NCTO), synthesized by solid state reaction method, have been studied. The Rietveld refinement of the room temperature neutron diffraction (ND) pattern specifies that the crystal structure of NCTO is monoclinic with space group P21/n, which contains an ordered array of alternate CoO6 and TiO6 octahedra. Magnetization measurements, carried out from room temperature to 2 K indicate a transition at ∼17 K. The rise of magnetization sharply below ∼17 K is attributed to the magnetic ordering of Nd3+ ions. Ac susceptibility data recorded in the range 70 K–5 K ruled out the presence of spin glass behavior in NCTO. To confirm the nature of magnetic ordering, temperature-dependent ND measurements were carried out and the analysis of ND data recorded at 15 K and 3 K shows the presence of canted antiferromagnetic spin structure of NCTO at low temperatures. Thermal variation of dielectric permittivity shows an anomaly at ∼720 K. First principles density functional theory (DFT) has been invoked to determine the band structure of the sample. The electronic structure has also been extensively investigated to correlate different observed properties of the sample.

Synthesis, structure and magnetic properties of copper(ii) azide.

A novel azide-bridged copper compound without an auxiliary ligand has been synthesized and characterized by single-crystal diffraction analysis. The compound consists of 1D double chains with end-on (EO) azide bridges. Furthermore, the neighboring chains are connected by weak coordination bonds, which leads to the formation of a 3D architecture. Low-temperature magnetic measurements reveal that antiferromagnetic interactions are dominant, with concomitant spin-canted antiferromagnetism.

Strain Coupling and Dynamic Relaxation in a Molecular Perovskite‐Like Multiferroic Metal–Organic Framework

AbstractMagnetic metal–organic frameworks (MOFs) with a perovskite structure AMX3 are emerging single‐phased multiferroics with different sources of magnetic and electric ordering. However, the atomic mechanism underlying the multiple ferroic coupling is convincingly clarified. In this work, large single crystals of [(CH3)2NH2][Ni(HCOO)3] are synthesized and shown to exhibit a first‐order ferroelectric phase transition at ≈178 K during heating and at ≈151 K during cooling, as confirmed by temperature‐dependent differential scanning calorimetry, Raman scattering, and X‐ray diffraction studies. Resonant ultrasound spectroscopy (RUS) is used to investigate the elastic and anelastic properties between 5 and 300 K. The RUS results show an abrupt disappearance of resonance peaks above the ferroelectric transition point of ≈178 K. This is probably due to the unfreezing of dimethylammonium cation motion which couples with local strain. Small changes in elastic properties associated with two known magnetic transition at ≈35 and ≈15 K, respectively, are indicative of weak magnetoelastic coupling. An apparent peak in acoustic loss accompanying the canted antiferromagnetic ordering (≈35 K) and spin reorientation transition (≈15 K) is attributed to dynamical magnetoelastic coupling on the RUS time scale of ≈10−6 s. In comparison with the same MOF structures containing Mn2+ and Co2+, the smaller Ni2+ ions effectively generate an internal chemical pressure and induce a compressed ion force on the anion frameworks. This study opens up a new landscape to explore possibilities for ferroic‐order coupling in molecular MOFs.

Exchange bias effect in a finite site disordered canted antiferromagnet

We report the temperature and magnetic field dependent magnetic properties of the single-phase polycrystalline La0.8Sr0.2Cr0.7Ru0.3O3 sample to explore the intrinsic magnetic phases of the sample. Our combined temperature and field dependent magnetization studies reveal the formation of ferromagnetic (FM) cluster-glass in the antiferromagnetic (AFM) matrix of host LaCrO3. Interestingly, the as-studied sample exhibits both zero-field-cooled (horizontal shift) and field-cooled (vertical shift) exchange bias effects and, in both cases, magnitude of exchange bias field continuously increases with the decrease of temperature. Our successive hysteresis loop measurements completely ruled out the effect of any minor hysteresis loop and thus, establishes this vertical shift as conventional field-cooled exchange bias (CEB) effect, originating from the uncompensated spins of randomly substituted canted AFM spin structure. A significantly larger value of CEB field (7.5 kOe) at 5 K is achieved for a cooling field of 50 kOe, not usually observed in conventional FM/AFM interfacial exchange-bias systems.

Coexistence of magnetic phases in La(Mn0.70Ga0.30)O3 under high pressure: A neutron powder diffraction investigation

Neutron powder diffraction was used to analyse the La(Mn0.70Ga0.30)O3 compound under pressures of up to 6.1 GPa and temperatures down to 1.3 K. At ambient pressure, the magnetic ground state corresponds to a canted antiferromagnetic AxFy-type spin ordering. As the pressure increases, the Fy component is suppressed and a novel Ay-type ordering takes place coexisting with the Ax-type.The simultaneous occurrence of these spin orderings can be ascribed to a demixing of the pristine nuclear phase into a Jahn-Teller distorted phase (where the Ax-ordering takes place) and an undistorted nuclear phase which grows under pressure (where the Ay-ordering develops).

Structural, Magnetization and Spin Wave Analysis in Layered 5d Iridate Sr2IrO4

Magnetic behavior has been studied in 5d layered compound Sr2IrO4. The material shows reasonable spin-orbit coupling effect. A canted type antiferromagnetic spin ordering induced by Dzyaloshinskii-Moriya antisymmetric interaction arising from IrO6 octahedral distortion is observed. Our structural analysis shows a rotation of IrO6 octahedra by ∼11.3° around c axis which works as precursor for (canted) weak ferromagnetic phase. Temperature dependant magnetization shows transition temperature ∼225 K and field dependent magnetization shows low moment 0.055 μB/f.u. Our spin-wave analysis of low temperature magnetization data shows very high stiffness constant ∼3365 meVÅ2, which is interesting for this low moment spin canting system.