Spin-Torque Nano-Oscillator as a Microwave Signal Source

被引：41

作者：

Prokopenko, Oleksandr ^{[1
]}

Bankowski, Elena ^{[2
]}

Meitzler, Thomas ^{[2
]}

Tiberkevich, Vasil ^{[3
]}

Slavin, Andrei ^{[3
]}

机构：

[1] Natl Taras Shevchenko Univ Kyiv, Fac Radiophys, UA-01601 Kiev, MSP, Ukraine

[2] US Army TARDEC, Warren, MI 48397 USA

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

来源：

IEEE MAGNETICS LETTERS | 2011年 / 2卷

基金：

美国国家科学基金会;

关键词：

Spin electronics; oscillators; electromagnetic radiation; phase-locked oscillators;

D O I：

10.1109/LMAG.2010.2102007

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We evaluate a possibility to use spin-torque nano-oscillators (STNOs) and oscillator arrays as new sources of microwave signals for telecommunication devices. The microwave signal generated by STNO can be received as oscillation of the device magnetoresistance (MR) or as direct electromagnetic emission of two effective magnetic dipoles. We calculate the dipolar microwave power emitted by STNO in free space and in several types of transmission lines and resonators. We demonstrate that although the power of a single STNO received through the MR effect is, typically, larger than the power of direct microwave emission of effective dipoles, the latter mechanism might have an advantage for sufficiently large arrays of coupled STNOs.

引用

页数：4

共 14 条

[1] Analysis of Electromagnetic Fields Generated by a Spin-Torque Oscillator [J].

Amin, Nurul ;

Xi, Haiwen ;

Tang, Michael X. .

IEEE TRANSACTIONS ON MAGNETICS, 2009, 45 (10) :4183-4186

[2] Emission of spin waves by a magnetic multilayer traversed by a current [J].

Berger, L .

PHYSICAL REVIEW B, 1996, 54 (13) :9353-9358

[3] Impact of the electrical connection of spin transfer nano-oscillators on their synchronization: an analytical study [J].

Georges, B. ;

Grollier, J. ;

Cros, V. ;

Fert, A. .

APPLIED PHYSICS LETTERS, 2008, 92 (23)

[4] Spin-torque oscillator using a perpendicular polarizer and a planar free layer [J].

Houssameddine, D. ;

Ebels, U. ;

Delaet, B. ;

Rodmacq, B. ;

Firastrau, I. ;

Ponthenier, F. ;

Brunet, M. ;

Thirion, C. ;

Michel, J.-P. ;

Prejbeanu-Buda, L. ;

Cyrille, M.-C. ;

Redon, O. ;

Dieny, B. .

NATURE MATERIALS, 2007, 6 (06) :447-453

[5] Microwave oscillations of a nanomagnet driven by a spin-polarized current [J].

Kiselev, SI ;

Sankey, JC ;

Krivorotov, IN ;

Emley, NC ;

Schoelkopf, RJ ;

Buhrman, RA ;

Ralph, DC .

NATURE, 2003, 425 (6956) :380-383

[6] Time-domain measurements of nanomagnet dynamics driven by spin-transfer torques [J].

Krivorotov, IN ;

Emley, NC ;

Sankey, JC ;

Kiselev, SI ;

Ralph, DC ;

Buhrman, RA .

SCIENCE, 2005, 307 (5707) :228-231

[7] Excitations of incoherent spin-waves due to spin-transfer torque [J].

Lee, KJ ;

Deac, A ;

Redon, O ;

Nozieres, JP ;

Dieny, B .

NATURE MATERIALS, 2004, 3 (12) :877-881

[8] Phase-locking in double-point-contact spin-transfer devices [J].

Mancoff, FB ;

Rizzo, ND ;

Engel, BN ;

Tehrani, S .

NATURE, 2005, 437 (7057) :393-395

[9]

Pikovsky A., 2007, Synchronization: A universal concept in nonlinear sciences (Repr.

[10]

Ramo S., 1984, FIELDS WAVES COMMUNI

← 1 2 →