Magnetic anisotropy of YFe3 compound

Bolyachkin, A.; Neznakhin, D. S.; Garaeva, T.V.; Андреев, А.В.; Bartashevich, M.I.

doi:10.1016/j.jmmm.2016.10.133

Cited by 10 publications

(5 citation statements)

References 19 publications

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“…The hard-axis magnetization curve does not reach the same maximum value as the easy-axis curve above µ0Ha, due to anisotropy of the magnetic moment. This observed difference of the easy and hard axes magnetization values above the anisotropy field indicates a possible anisotropy of the magnetization, as has been reported for different rare-earth transition-meal systems [92][93][94]. Additionally, the low field region of the hard axis measurements shows non-linear behavior which is due to the formation of twins in the "single-crystals".…”

Section: Single Crystals and Intrinsic Magnetic Propertiessupporting

confidence: 66%

Twins – A weak link in the magnetic hardening of ThMn12-type permanent magnets

et al. 2021

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Nd2Fe14B-type materials exhibit the highest energy product around room temperature and hence dominate the high-performance permanent magnet market. Intensive research efforts aim at alternative material systems containing less critical elements with similar or better magnetic properties. Nd-and Sm-based compounds with a ThMn12-type structure exhibit intrinsic properties comparable or even superior to Nd2Fe14B. However, it has not been possible to achieve technically relevant coercivity and remanent magnetization in ThMn12-based bulk sintered magnets. Using SmFe11Ti as a prototypical representative, we demonstrate that one important reason for the poor performance is the formation of twins inside micro-crystalline grains. The nature of the twins in SmFe11Ti was investigated in twinned "single crystals" and both bulk and thin film poly-crystalline samples, using advanced electron microscopy and atom probe tomography as well as simulations and compared with benchmark Nd2Fe14B. Both micro-twins and nano-twins show a twin orientation of 57±2 • and an enrichment in Sm, which could affect domain wall motion in this 2 material. Micromagnetic simulations indicate that twins act as nucleation centers, representing the magnetically weakest link in the microstructure. The relation between twin formation energies and geometrical features are briefly discussed using molecular dynamic simulations.

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Section: Single Crystals and Intrinsic Magnetic Propertiessupporting

confidence: 66%

Twins – A weak link in the magnetic hardening of ThMn12-type permanent magnets

et al. 2021

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“…In such a case, the slope and intercept of an H/M vs M 2 plot will correspond to , respectively [21]. The applicability of the Sucksmith and Thompson method to various magneto-crystalline anisotropy scheme has been confirmed from modelling studies [22] and used in different materials with a combination of easy plane and hard c axis [23,24]. Beside systematic error, due to the significant relative error on magnetization, the differences between maxima and minima for the intercepts and slopes of H in /M vs (μ 0 M) 2 linear fits are large too, resulting in sizable uncertainties on K 1 and K 2 .…”

Section: Resultsmentioning

confidence: 90%

Magnetic properties, anisotropy parameters and magnetocaloric effect of flux grown MnFe4Si3 single crystal

Yibole¹,

Hanggai²,

Ou³

et al. 2020

Journal of Magnetism and Magnetic Materials

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The transition-metal based alloy MnFe 4 Si 3 not only is a potential candidate for room temperature magnetocaloric applications, but also shows a large magnetic anisotropy forming an interesting case study in the search for rare-earth free permanent magnets. However, former polycrystalline and single crystal studies led to major disagreements about the order of the magnetic transition and the magnetocrystalline anisotropy scheme, which are two essential points for the understanding of this alloy. Here, magnetic, magnetocaloric properties and the magnetic anisotropy of MnFe 4 Si 3 (Mn~0 .86 Fe~4 .24 Si~2 .90) are investigated on a high quality single crystal grown by flux method, and compared to polycrystalline materials. Using the recently proposed criterion of field dependence of the magnetocaloric effect, we show that the ferromagnetic transition is more likely to be of second order, which is fully compatible with the absence of thermal hysteresis at the ferromagnetic transition in the present MnFe 4 Si 3 crystal. The c axis is confirmed to be the hard magnetic axis, both in single crystal and polycrystalline MnFe 4 Si 3 , and a large, dominant, K 1 anisotropy constant (~−2.5 MJ m −3) is found at low temperatures.

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“…Second, different degree of quenching of the orbital angular momentum of 3d atoms in different crystallographic directions [2]. The phenomenon is especially remarkable for high anisotropy intermetallic compounds based on R-T systems where R is a rare earth element and T is a 3d transition metal [3][4][5][6][7]. The magnetization anisotropy can be quantitatively characterized by a dimensionless parameter [3]:…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the following can be written 𝑀 𝑠 (𝐻) = 𝑀 𝑠 (0) + 𝜒𝐻 as a first approximation that was named as a paraprocess by Akulov [8]. However, for the processing of magnetization curves using, for example, a numeric technique [4] or the modified Sucksmith-Thompson method [5], it is not sufficient to simply obtain MEA and MHA; the angular dependence of saturation magnetization should also be known. It is usually assumed that the parameter p is small, i.e.…”

Section: Introductionmentioning

confidence: 99%