Enhanced spin pumping at yttrium iron garnet/Au interfaces

被引：155

作者：

Burrowes, C. ^{[1
]}

Heinrich, B. ^{[1
]}

Kardasz, B. ^{[1
]}

Montoya, E. A. ^{[1
]}

Girt, E. ^{[1
]}

Sun, Yiyan ^{[2
]}

Song, Young-Yeal ^{[2
]}

Wu, Mingzhong ^{[2
]}

机构：

[1] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada

[2] Colorado State Univ, Dept Phys, Ft Collins, CO 80523 USA

来源：

APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 09期

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

ferrimagnetic materials; ferromagnetic resonance; gold; ion beam assisted deposition; iron; magnetic thin films; metal-insulator boundaries; spin polarised transport; yttrium compounds;

D O I：

10.1063/1.3690918

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Spin injection across the ferrimagnetic insulator yttrium iron garnet (YIG)/normal metal Au interface was studied using ferromagnetic resonance. The spin mixing conductance was determined by comparing the Gilbert damping parameter alpha in YIG/Au and YIG/Au/Fe heterostructures. The main purpose of this study was to correlate the spin pumping efficiency with chemical modifications of the YIG film surface using in situ etching and deposition techniques. By means of Ar+ ion beam etching, one is able to increase the spin mixing conductance at the YIG/Au interface by a factor of 5 compared to the untreated YIG/Au interface. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3690918]

引用

页数：4

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