Giant spin and orbital moment anisotropies of a Cu-phthalocyanine monolayer
Giant spin and orbital moment anisotropies of a Cu-phthalocyanine monolayer
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DOI：
10.1103/physrevb.82.014405
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发表时间：
2010-07
影响因子：
3.7
通讯作者：
S. Stepanow;A. Mugarza;G. Ceballos;P. Moras;J. Cezar;C. Carbone;P. Gambardella
中科院分区：
文献类型：
--
作者：
S. Stepanow;A. Mugarza;G. Ceballos;P. Moras;J. Cezar;C. Carbone;P. Gambardella
利用X射线磁性圆二色性XMCD和配位场多重态计算研究了酞菁铜在Ag 100上的磁性。相反，其他金属-Pc吸附在金属上，我们表明，当地的CuPc时刻生存与基板的电子状态的相互作用，并提出增强的易感性相对于散装粉末样品。我们的测量揭示了金属有机层中非凡的轨道矩各向异性500%和各向异性自旋偶极矩，其高达各向同性自旋的两倍。基于XMCD求和规则，提供了轨道、自旋和自旋-轨道算子的完整描述。
The magnetism of a Cu-phthalocyanine CuPc monolayer on Ag100 was investigated using x-ray magnetic circular dichroism XMCD and ligand-field multiplet calculations. Contrary to other metal-Pc adsorbed on metals, we show that the local CuPc moment survives the interaction with the electronic states of the substrate and presents enhanced susceptibility with respect to bulk powder samples. Our measurements reveal extraordinary orbital moment anisotropy 500% and an anisotropic spin dipole moment up to twice the isotropic spin in a metal-organic layer. A complete description of the orbital, spin, and spin-orbit operators is provided based on the XMCD sum rules.