INTRINSIC BIQUADRATIC CONTRIBUTION TO INTERLAYER COUPLING IN MAGNETIC LAYERED STRUCTURES

被引：23

作者：

BARNAS, J

机构：

[1] A. Mickiewicz Univ, Poznan, Poland

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1993年 / 123卷 / 1-2期

关键词：

D O I：

10.1016/0304-8853(93)90007-O

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An intrinsic mechanism of the biquadratic term in the interlayer coupling energy is analysed numerically within the spin-polarized free-electron approximation for ferromagnetic films and free-electron approximation for non-magnetic spacers. The corresponding coupling parameter does not vanish in the limit of flat interfaces, contrary to Slonczewski's mechanism (Phys. Rev. Lett. 67 (1991) 3172) which gives a non-zero contribution only in the presence of interface roughness (steps). The coupling parameter oscillates with the interlayer thickness and the oscillation period is equal to half of the corresponding period for bilinear term. The dependence of the coupling parameter on thickness of the magnetic films is also analysed.

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页码：L21 / L24

页数：4

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