论文标题
各向异性自旋分布和垂直磁各向异性在分层铁磁半导体（BA，K）（Zn，Mn）$ _ {2} $ as $ _ {2} $中
Anisotropic spin distribution and perpendicular magnetic anisotropy in the layered ferromagnetic semiconductor (Ba,K)(Zn,Mn)$_{2}$As$_{2}$
论文作者
论文摘要
新的铁磁半导体（BA，K）（Zn，Mn）$ _ {2} $作为$ _ {2} $的垂直磁各向异性是通过角度依赖的X射线磁性圆形二色dichroism测量结果研究的。通过将Stoner-Wohlfarth模型拟合到投影磁矩的磁场角依赖性，可以推断出具有0.85 T的各向异性场的大磁各向异性。横向XMCD光谱突出显示了Mn 3 $ d $电子的各向异性分布，其中$ d_ {xz} $和$ d_ {yz} $ orbitals比$ d_ {xy} $少了，因为从$ d_ {2d} $中散发出$ d_ {2d} $ splated of the e earlonged mnas $ snas $} $ _ {4建议磁各向异性起源于$ p $ - $ d_ {xz} $，$ d_ {yz} $杂交状态在费米级别上的变性，并且由于沿$ z $ z $方向对准旋转时旋转式偶联时产生的能量增益。
Perpendicular magnetic anisotropy of the new ferromagnetic semiconductor (Ba,K)(Zn,Mn)$_{2}$As$_{2}$ is studied by angle-dependent x-ray magnetic circular dichroism measurements. The large magnetic anisotropy with the anisotropy field of 0.85 T is deduced by fitting the Stoner-Wohlfarth model to the magnetic-field-angle dependence of the projected magnetic moment. Transverse XMCD spectra highlights the anisotropic distribution of Mn 3$d$ electrons, where the $d_{xz}$ and $d_{yz}$ orbitals are less populated than the $d_{xy}$ state because of the $D_{2d}$ splitting arising from the elongated MnAs$_{4}$ tetrahedra. It is suggested that the magnetic anisotropy originates from the degeneracy lifting of $p$-$d_{xz}$, $d_{yz}$ hybridized states at the Fermi level and resulting energy gain due to spin-orbit coupling when spins are aligned along the $z$ direction.
