Interfacial spin and heat transfer between metals and magnetic insulators

被引：70

作者：

Bender, Scott A. ^{[1
]}

Tserkovnyak, Yaroslav ^{[1
]}

机构：

[1] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

来源：

PHYSICAL REVIEW B | 2015年 / 91卷 / 14期

关键词：

MULTILAYER; FERROMAGNET; EXCITATION; DYNAMICS;

D O I：

10.1103/PhysRevB.91.140402

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the role of thermal magnons in spin and heat transport across a normal-metal/insulating-ferromagnet interface, which is beyond an elastic electronic spin transfer. Using an interfacial exchange Hamiltonian, which couples spins of itinerant and localized orbitals, we calculate spin and energy currents for an arbitrary interfacial temperature difference and misalignment of spin accumulation in the normal metal relative to the ferromagnetic order. The magnonic contribution to spin current leads to a temperature-dependent torque on the magnetic order parameter; reciprocally, the coherent precession of the magnetization pumps spin current into the normal metal, the magnitude of which is affected by the presence of thermal magnons.

引用

页数：5

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