rf auto-oscillations in antiferromagnetically coupled layers with different coupling strengths

被引：18

作者：

Seki, Takeshi ^{[1
]}

Tomita, Hiroyuki ^{[1
]}

Shinjo, Teruya ^{[1
]}

Suzuki, Yoshishige ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Engn Sci, Toyonaka, Osaka 5608531, Japan

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 16期

关键词：

SPIN-POLARIZED CURRENT; MICROWAVE GENERATION; PHASE-LOCKING; FE LAYERS; DRIVEN; EMISSION; DEVICES; TORQUE; CR;

D O I：

10.1063/1.3505357

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

rf auto-oscillation induced by spin-transfer torque was investigated in Fe/Cr/Fe systems that had antiferromagnetically coupled Fe layers. As the coupling strength increased, the generation linewidth (Delta f) reduced remarkably whereas the oscillation frequency (f) and the onset current of the auto-oscillation increased. The strong antiferromagnetic coupling led to less variation in f depending on the bias current. These results indicate that the antiferromagnetic coupling allows us to reduce Delta f and to control the nonlinearity of the rf auto-oscillation. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3505357]

引用

页数：3

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