Intrinsic magnetic properties of (Sm,Gd)Fe12-based compounds with minimized addition of Ti
Intrinsic magnetic properties of (Sm,Gd)Fe12-based compounds with minimized addition of Ti
复制标题
最小化 Ti 添加量的 (Sm,Gd)Fe12 基化合物的固有磁性能
DOI：
10.1016/j.jallcom.2020.157491
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发表时间：
2021
影响因子：
6.2
通讯作者：
K. Hono
中科院分区：
文献类型：
--
作者：
P. Tozman;H. Sepehri;T. Ohkubo;K. Hono
具有thmn12型结构的smfe12基化合物被认为是低稀土永磁体的潜在候选材料；但其相稳定性差，阻碍了其实际应用。本文研究了Gd对thmn12结构相稳定性和（Sm0.8Gd0.2）（Fe0.8Co0.2）12-xTix（x= 0.5, 0.6, 0.65, 0.75, 0.85, 1）化合物α-Fe消除的影响。在300 K饱和磁化、μ0Ms= 1.46 T、各向异性场μ0Ha= 9.24 T、居里温度Tc= 816 K条件下，获得了一种1:12相的（Sm0.8Gd0.2）（Fe0.8Co0.2）11.25 ti0.75化合物。与不含gd的样品不同，掺杂gd的样品在高温下μ 0m和μ 0h的快速衰减受到阻碍；这是由于Gd的5d轨道和Fe的3d轨道之间的杂化以及稀土（RE）与Fe亚晶格之间的磁耦合增加所致。与之前报道的smfe12基化合物Sm(Fe0.8Co0.2) 11ti1和（Sm0.8Zr0.2）（Fe0.8Co0.2）11.5 ti0.5和Nd2Fe14B化合物相比，（Sm0.8Gd0.2）（Fe0.8Co0.2）11.25 ti0.75在400 K以上具有更高的磁各向异性。
SmFe12-based compounds with the ThMn12type structure are considered to be potential candidates for rare-earth-lean permanent magnets; however, their poor phase stability has hindered practical application. In this work, the effects of Gd on the phase stability of the ThMn12structure and the elimination of α-Fe for (Sm0.8Gd0.2)(Fe0.8Co0.2)12-xTix(x= 0.5, 0.6, 0.65, 0.75, 0.85, and 1) compounds are investigated. A single 1:12 phase was obtained for (Sm0.8Gd0.2)(Fe0.8Co0.2)11.25Ti0.75compound with excellent intrinsic magnetic properties at 300 K with saturation magnetization, μ0Ms= 1.46 T, anisotropy field, μ0Ha= 9.24 T, and Curie temperature,Tc= 816 K. Unlike the Gd-free sample, the rapid decay of μ0Msand μ0Haat elevated temperatures was hindered for the Gd-doped sample; this originated from the hybridization between 5d orbitals of Gd and 3d orbitals of Fe along with the increase in magnetic coupling between the rare earth (RE) and Fe sublattices. (Sm0.8Gd0.2)(Fe0.8Co0.2)11.25Ti0.75has a higher magnetic anisotropy field above 400 K compared with those of the previously reported SmFe12-based compounds Sm(Fe0.8Co0.2)11Ti1and (Sm0.8Zr0.2)(Fe0.8Co0.2)11.5Ti0.5and Nd2Fe14B compound.
影响因子：
3.2
作者：
SAGAWA, M;FUJIMURA, S;MATSUURA, Y
通讯作者：
MATSUURA, Y