Dynamic exchange coupling and Gilbert damping in magnetic multilayers (invited)

被引：23

作者：

Tserkovnyak, Y ^{[1
]}

Brataas, A

Bauer, GEW

机构：

[1] Harvard Univ, Lyman Lab Phys, Cambridge, MA 02138 USA

[2] Norwegian Univ Sci & Technol, Dept Phys, N-7491 Trondheim, Norway

[3] Delft Univ Technol, Dept NanoSci, NL-2628 CJ Delft, Netherlands

来源：

JOURNAL OF APPLIED PHYSICS | 2003年 / 93卷 / 10期

关键词：

D O I：

10.1063/1.1538173

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We theoretically study dynamic properties of thin ferromagnetic films in contact with normal metals. Moving magnetizations cause a flow of spins into adjacent conductors, which relax by spin flip, scatter back into the ferromagnet, or are absorbed by another ferromagnet. Relaxation of spins outside the moving magnetization enhances the overall damping of the magnetization dynamics in accordance with the Gilbert phenomenology. Transfer of spins between different ferromagnets by these nonequilibrium spin currents leads to a long-ranged dynamic exchange interaction and collective excitation modes. Our predictions agree well with recent ferromagnetic-resonance experiments on ultrathin magnetic films. (C) 2003 American Institute of Physics.

引用

页码：7534 / 7538

页数：5

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