Interlayer exchange coupling in fine-layered Fe/Au superlattices
Interlayer exchange coupling in fine-layered Fe/Au superlattices
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细层 Fe/Au 超晶格中的层间交换耦合
DOI：
10.1103/physrevb.63.100405
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发表时间：
2001
影响因子：
3.7
通讯作者：
P. Grünberg
中科院分区：
文献类型：
--
作者：
A. Yoshihara;Jian;K. Takanashi;K. Himi;Y. Kawazoe;H. Fujimori;P. Grünberg
用300K自旋波的布里渊散射研究了Fe(N ML)/Au(N ML)超晶格(ML‘s=单分子层，n=1~5)中的层间交换耦合.结果表明，对于所有的n，交换耦合强度J i都是铁磁性的，但交换耦合强度J i表现出振荡行为：偶数ML较大，奇数ML较小.对于n=1，对应于具有L 1 0结构的有序合金.我们得到了Ji=43.6±5.0mJ/m2。用自洽全势线性化增广平面波方法从头算计算了Ji，除了n=3预测了反铁磁基态外，与实验值符合得很好。
Interlayer exchange coupling (IEC) in Fe (n ML)/A u (n ML) superlattices (SL’s)(ML’s= monolayers, n= 1 to 5) has been examined by Brillouin scattering from spin waves at 300 K. The IEC was found to be ferromagnetic for all n, but the IEC strength J i exhibits oscillatory behavior: it is large for even ML’s and small for odd ML’s. For n= 1 which correponds to an ordered alloy with the L 1 0 structure, we obtain J i= 43.6±5.0 m J/m 2. Ab initio calculation of J i by the self-consistent full-potential linearized augumented-plane-wave method gives a good agreement with the experimental values, except for n= 3 where an antiferromagnetic ground state is predicted.