Oscillatory interlayer coupling in Co/Pt multilayers with perpendicular anisotropy

被引：106
作者：
Knepper, JW [1 ]
Yang, FY [1 ]
机构：
[1] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA
来源：
PHYSICAL REVIEW B | 2005年 / 71卷 / 22期
关键词：
D O I：
10.1103/PhysRevB.71.224403
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Interlayer coupling in several series of [Co/Pt](N) multilayers with perpendicular anisotropy and Pt thicknesses from 3 to 79 angstrom has been investigated using magnetometry measurements at temperatures from 293 K down to 8 K. Oscillatory interlayer coupling with a ferromagnetic background as a function of the Pt thickness was observed in every multilayer series. This oscillation of interlayer coupling can be attributed to the Ruderman-Kittel-Kasuya-Yosida interaction. Unusual temperature dependence of the coercivity and the saturation magnetization suggests that the polarization of Pt atoms by the adjacent Co layers is responsible for the ferromagnetic interlayer coupling in Co/Pt multilayers and the magnetic polarization of Pt atoms extends further into the Pt layers as the temperature decreases.
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