Injection locking of tunnel junction oscillators to a microwave current

被引：45

作者：

Quinsat, M. ^{[1
,2
]}

Sierra, J. F. ^{[2
]}

Firastrau, I. ^{[3
]}

Tiberkevich, V. ^{[4
]}

Slavin, A. ^{[4
]}

Gusakova, D. ^{[2
]}

Buda-Prejbeanu, L. D. ^{[2
]}

Zarudniev, M. ^{[1
]}

Michel, J. -P. ^{[1
,2
]}

Ebels, U. ^{[2
]}

Dieny, B. ^{[2
]}

Cyrille, M. -C. ^{[1
]}

Katine, J. A. ^{[5
]}

Mauri, D. ^{[5
]}

Zeltser, A. ^{[5
]}

机构：

[1] CEA LETI, F-38054 Grenoble, France

[2] UJF Grenoble 1, SPINTEC, Grenoble INP, UMR CEA,CNRS,INAC, F-38054 Grenoble, France

[3] Transilvania Univ Brasov, R-500036 Brasov, Romania

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

[5] Hitachi Global Storage Technol, San Jose, CA 95135 USA

来源：

APPLIED PHYSICS LETTERS | 2011年 / 98卷 / 18期

基金：

美国国家科学基金会;

关键词：

SPIN-POLARIZED CURRENT; PHASE-LOCKING; DRIVEN;

D O I：

10.1063/1.3587575

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Injection locking of a spin transfer nano-oscillator, based on an in-plane magnetized magnetic tunnel junction and generating the frequency f(0), to an external signal of varying frequency f(e) is studied experimentally and with macrospin simulations. It is shown, that if the driving signal has the form of a microwave current, the locking effect is well-pronounced near f(e) congruent to 2f(0), but is almost completely absent near f(e) congruent to f(0), confirming predictions of analytical theory. It is also shown that noise plays an important role in the locking process, causing the linewidth of the locked oscillation to substantially exceed that of the driving signal. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3587575]

引用

页数：3

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