Preserved interfacial magnetism and giant antiferromagnetic exchange coupling in Co/Rh sandwiches
Preserved interfacial magnetism and giant antiferromagnetic exchange coupling in Co/Rh sandwiches
复制标题
Co/Rh 三明治中的保留界面磁性和巨大反铁磁交换耦合
DOI：
10.1209/epl/i1997-00355-6
复制
发表时间：
1997
期刊：
影响因子：
1.8
通讯作者：
K. Ounadjela
中科院分区：
文献类型：
--
作者：
S. Zoll;A. Dinia;D. Stoeffler;M. Gester;H. Berg;K. Ounadjela
通过磁化和输运实验研究了特高压蒸发制备的 Co/Rh/Co 三明治结构中的层间耦合。我们发现，Rh 薄层的反铁磁耦合强度是磁系统中有史以来最大的，对于 5 A 厚的 Rh 夹层，反铁磁耦合强度达到约 34 erg/cm2。该值比之前在类似条件下制备的 Co/Ru 体系中观察到的最高值大 7 至 8 倍。这两个系统之间的耦合强度出人意料的巨大差异主要是由于界面的磁性所致。具有混合界面的超晶格中磁矩的从头计算进一步支持了这一点。
The interlayer coupling in Co/Rh/Co sandwiches prepared by UHV evaporation has been investigated by means of magnetization and transport experiments. We found that the antiferromagnetic coupling strength for thin Rh layers is the largest ever obtained in magnetic systems, reaching approximately 34 erg/cm2 for 5 A thick Rh interlayer. This value is 7 to 8 times larger than the highest value previously observed in the Co/Ru system prepared under similar conditions. This unexpectedly large difference in the coupling strength between these two systems is mainly due to the magnetic nature of the interfaces. This is further supported by ab initio calculations of the magnetic moments in superlattices with mixed interfaces.