Šipr O, Bornemann S, Ebert H, Minár J
Institute of Physics of the ASCR vvi, Cukrovarnická 10, CZ-162 53 Prague, Czech Republic.
J Phys Condens Matter. 2014 May 14;26(19):196002. doi: 10.1088/0953-8984/26/19/196002. Epub 2014 Apr 24.
The substrate contribution to the magnetic anisotropy energy (MAE) of supported nanostructures can be assessed by a site-selective manipulation of the spin-orbit coupling (SOC) and of the effective exchange field Bex. A systematic study of Co adatoms and Co monolayers on the (1 1 1) surfaces of Cu, Ag, Au, Pd and Pt is performed to study common trends in this class of materials. It is found that for adatoms, the influence of the substrate SOC and Bex is relatively small (10-30% of the MAE) while for monolayers, this influence can be substantial. The influence of the substrate SOC is much more important than the influence of the substrate Bex, except for highly polarizable substrates with a strong SOC (such as Pt). The substrate always promotes the tendency to an out-of-plane orientation of the easy magnetic axis for all the investigated systems.
通过对自旋轨道耦合（SOC）和有效交换场Bex进行位点选择性操控，可以评估支撑纳米结构对磁各向异性能（MAE）的衬底贡献。对铜、银、金、钯和铂的（1 1 1）表面上的钴吸附原子和钴单层进行了系统研究，以探究这类材料的共同趋势。研究发现，对于吸附原子，衬底SOC和Bex的影响相对较小（占MAE的10%-30%），而对于单层，这种影响可能很大。衬底SOC的影响比衬底Bex的影响重要得多，但具有强SOC的高极化衬底（如铂）除外。对于所有研究的体系，衬底总是促进易磁化轴的面外取向趋势。
