Unconventional spin currents in magnetic films

被引：12

作者：

Bozhko, Dmytro A. ^{[1
,2
]}

Musiienko-Shmarova, Halyna Yu ^{[1
]}

Tiberkevich, Vasyl S. ^{[3
]}

Slavin, Andrei N. ^{[3
]}

Syvorotka, Ihor I. ^{[4
]}

Hillebrands, Burkard ^{[1
]}

Serga, Alexander A. ^{[1
]}

机构：

[1] Tech Univ Kaiserslautern, Fachbereich Phys & Landesforschungszemtrum OPTIMA, D-67663 Kaiserslautern, Germany

[2] Univ Colorado, Dept Phys & Energy Sci, Colorado Springs, CO 80918 USA

[3] Oakland Univ, Dept Phys, Rochester, MI 48309 USA

[4] SRC Carat, Dept Crystal Phys & Technol, UA-79031 Lvov, Ukraine

来源：

PHYSICAL REVIEW RESEARCH | 2020年 / 2卷 / 02期

关键词：

FERROMAGNETIC-RESONANCE; ROOM-TEMPERATURE; CONSTRUCTION; PERFORMANCE; RELAXATION; MAGNONS; WAVES; MODES;

D O I：

10.1103/PhysRevResearch.2.023324

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A spin current-a flow of spin angular momentum-can be carried either by spin-polarized free electrons or by magnons, the quanta of a moving collective oscillation of localized electron spins, i.e., a spin wave. Traditionally, it was assumed that a spin wave in a magnetic film with spin-sink-free surfaces can transfer energy and angular momentum only along its propagation direction. In this work, using Brillouin light-scattering spectroscopy in combination with a theory of dipole-exchange spin-wave spectra, we show that in obliquely magnetized free magnetic films, the in-plane propagation of spin waves is accompanied by a transverse spin current along the film normal without any corresponding transverse transport of energy.

引用

页数：10

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