论文标题
四方摩托勒合金的磁结晶各向异性中的相过渡：RH $ _2T $ SB，$ t = $ fe，co，co
Phase transition in the magnetocrystalline anisotropy of tetragonal Heusler alloys: Rh$_2T$Sb, $T=$ Fe, Co
论文作者
论文摘要
这项工作报告了第一个原理计算四方赫斯勒化合物的电子和磁性结构，并用构图rh $ _2 $ _2 $ fe $ _ {x} $ co $ _ {1-x} $ sb（$ 0 \ leq x \ leq x \ leq1 $）。发现磁矩从2 $ $μ_b$增加到3.4〜$μ_b$，而curie温度从500 k降至464〜K，而Fe含量$ x $增加。 $ 3D $过渡金属对磁矩做出了主要贡献，而RH仅贡献大约0.2〜 $μ_b$每个原子，而与组合无关。该论文重点介绍了边界化合物Rh $ _2 $ FESB，RH $ _2 $ _2 $ fe $ _ {0.5} $ co $ $ _ {0.5} $ sb和RH $ _2 $ COSB。当构图从rh $ _2 $ cosb变为RH $ _2 $ FESB时，从易于轴到易于平面各向异性的过渡会观察到。过渡发生在大约40 \％的铁浓度下。
This work reports on first principles calculations of the electronic and magnetic structure of tetragonal Heusler compounds with the composition Rh$_2$Fe$_{x}$Co$_{1-x}$Sb ($0\leq x\leq1$). It is found that the magnetic moments increase from 2 to 3.4~$μ_B$ and the Curie temperature decreases from 500 to 464~K with increasing Fe content $x$. The $3d$ transition metals make the main contribution to the magnetic moments, whereas Rh contributes only approximately 0.2~$μ_B$ per atom, independent of the composition. The paper focuses on the magnetocrystalline anisotropy of the borderline compounds Rh$_2$FeSb, Rh$_2$Fe$_{0.5}$Co$_{0.5}$Sb, and Rh$_2$CoSb. A transition from easy-axis to easy-plane anisotropy is observed when the composition changes from Rh$_2$CoSb to Rh$_2$FeSb. The transition occurs at an iron concentration of approximately 40\%.
