Goering E, Gold S, Schütz G
Lehrstuhl für Experimentalphysik IV, Universität Würzburg, Germany.
J Synchrotron Radiat. 2001 Mar 1;8(Pt 2):422-4. doi: 10.1107/s0909049500018355.
We have investigated the magnetism of Holmium-Iron-Garnet (Ho3Fe5O12) at the Ho M4,5 - the Fe L2,3 - and the O K - edges. As expected switching of the sub-lattice magnetization is observed at the compensation temperature. We will give detailed analysis ofthe Ho and Fe XMCD signals, using sum rules. Fe dichroism is analyzed in terms of 3d ground state moments and compared to Gadolinium-Iron-Garnet (Gd3Fe5O12). Contributions of octahedral and tetrahedral Fe sites could be separated and analyzed quantitatively. At the oxygen K edge two different structures are observable. Those structures show different temperature dependencies. Therefore we address these features separately to Fe and Rare Earth contributions.
我们研究了钬铁石榴石（Ho3Fe5O12）在钬M4、5边、铁L2、3边和氧K边的磁性。正如预期的那样，在补偿温度下观察到了亚晶格磁化强度的转变。我们将使用求和规则对钬和铁的XMCD信号进行详细分析。从3d基态磁矩的角度分析了铁的二向色性，并与钆铁石榴石（Gd3Fe5O12）进行了比较。八面体和四面体铁位点的贡献可以分离并进行定量分析。在氧K边可以观察到两种不同的结构。这些结构表现出不同的温度依赖性。因此，我们分别针对铁和稀土的贡献来探讨这些特征。
