论文标题
Mn离子在稀释的磁性半导体Ba $ _ {1-x} $ k $ _ {x} $（Zn $ _ {1-Y} $ _ {1-y} $ _ {y} $ _ {2} $ as $ _ {2} $ _ {2} $ ty x-ray nightroist的dichroist和
Magnetic Properties and Electronic Configurations of Mn Ions in the Diluted Magnetic Semiconductor Ba$_{1-x}$K$_{x}$(Zn$_{1-y}$Mn$_{y}$)$_{2}$As$_{2}$ Studied by X-ray Magnetic Circular Dichroism and Resonant Inelastic X-ray Scattering
论文作者
论文摘要
新稀释的磁性半导体Ba $ _ {1-x} $ k $ _ {x} $（Zn $ _ {1-Y} $ Mn $ _ {y} $ _ {2} $ as x-ray dicroist dichroiss（ Mn $ L_ {2,3} $ edge的X射线散射（RIX）。 XMCD光谱的总和规则分析产生了$0.45μ_ {\ text {b}} $/mn的净旋转力矩和$0.05μ_ {\ text {b}} $/mn的小轨道矩。这表明Mn原子处于$ d^{5} $的高旋转构型中，而Mn离子之间存在竞争的铁磁和抗铁磁相互作用的存在会减少净旋转力矩。 RIXS Spectra显示从1到6 EV的能量损失，源于MN离子的$ D $ -D $ Crystal Field兴奋。基于RIXS线形状的比较与Ga $ _ {1-x} $ Mn $ _ {x} $的比较ba $ _ {1-x} $ k $ _ {x} $（zn $ _ {1-y} $ mn $ _ {y} $）$ _ {2} $ as $ _ {2} $不仅是收费的$ 3D^{5} $ nline comportion {$ nline {$ nline {$ nline {$ nline {配体孔）具有弱绑定的孔，如Ga $ _ {1-x} $ Mn $ _ {X} $ AS，以及带有免费孔的纯$ 3D^{5} $配置。
The magnetic properties and the electronic excitations of the new diluted magnetic semiconductor Ba$_{1-x}$K$_{x}$(Zn$_{1-y}$Mn$_{y}$)$_{2}$As$_{2}$ have been studied by x-ray magnetic circular dichroism (XMCD) and resonant inelastic x-ray scattering (RIXS) at the Mn $L_{2,3}$ edge. The sum rule analysis of the XMCD spectra yields the net spin moment of $0.45μ_{\text{B}}$/Mn and the small orbital moment of $0.05μ_{\text{B}}$/Mn. This indicates that the Mn atoms are in the high-spin configurations of $d^{5}$, whereas the presence of competing ferromagnetic and antiferromagnetic interactions between the Mn ions reduces the net spin moment. RIXS spectra show broad peaks from 1 to 6 eV energy loss, which originate from the $d$-$d$ crystal field excitations of the Mn ions. Based on a comparison of the RIXS line shapes with those of Ga$_{1-x}$Mn$_{x}$As, we conclude that the ground state of Mn in Ba$_{1-x}$K$_{x}$(Zn$_{1-y}$Mn$_{y}$)$_{2}$As$_{2}$ consists not only of the charge-transferred $3d^{5}\underline{L}$ electron configuration ($\underline{L}$: ligand hole) with weakly bound holes as in Ga$_{1-x}$Mn$_{x}$As, but also of the pure $3d^{5}$ configuration with free holes.
