Effect of Temperature in Hysteretic Synchronization of Magnetic Vortex Spin-Torque Nano-Oscillators

被引：3

作者：

d'Aquino, M. ^{[1
]}

Perna, S. ^{[2
]}

Quercia, A. ^{[2
]}

Scalera, V. ^{[2
]}

Serpico, C. ^{[2
]}

机构：

[1] Univ Naples Parthenope, Engn Dept, I-80143 Naples, Italy

[2] Univ Naples Federico II, Dept Elect Engn & ICT, I-80125 Naples, Italy

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2017年 / 53卷 / 11期

关键词：

Hysteresis; spin-torque; synchronization; thermal fluctuations; vortex oscillator; INJECTION LOCKING; POLARIZED CURRENT; DYNAMICS; DRIVEN; MOTION;

D O I：

10.1109/TMAG.2017.2702633

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：

The synchronization of vortex spin-transfer nano-oscillators (both nanopillar and nanocontact structures) with external microwave excitations is considered. A collective variables description is used to derive an analytical reduced-order model for the vortex core dynamics, which is able to predict all the possible oscillation regimes and hysteretic transitions among them. The influence of thermal fluctuations on hysteretic synchronization is studied by full micromagnetic simulations. The numerical results are in good agreement with the theory.

引用

页数：5

共 33 条

[1] STUDY OF LOCKING PHENOMENA IN OSCILLATORS [J].

ADLER, R .

PROCEEDINGS OF THE IEEE, 1973, 61 (10) :1380-1385

[2]

Bertotti G, 2009, NONLINEAR MAGNETIZATION DYNAMICS IN NANOSYSTEMS

[3]

Bogoliubov N.N., 1961, Asymptotic Methods in the Theory of Non-linear Oscillations

[4] Analytical treatment of synchronization of spin-torque oscillators by microwave magnetic fields [J].

Bonin, R. ;

Bertotti, G. ;

Serpico, C. ;

Mayergoyz, I. D. ;

d'Aquino, M. .

EUROPEAN PHYSICAL JOURNAL B, 2009, 68 (02) :221-231

[5] Geometrical integration of Landau-Lifshitz-Gilbert equation based on the mid-point rule [J].

d'Aquino, M ;

Serpico, C ;

Miano, G .

JOURNAL OF COMPUTATIONAL PHYSICS, 2005, 209 (02) :730-753

[6] Analysis of synchronized regimes for injection-locked spin-transfer nano-oscillators [J].

d'Aquino, M. ;

Serpico, C. ;

Bonin, R. ;

Bertotti, G. ;

Mayergoyz, I. D. .

PHYSICA B-CONDENSED MATTER, 2012, 407 (09) :1357-1364

[7] Midpoint numerical technique for stochastic Landau-Lifshitz-Gilbert dynamics [J].

d'Aquino, M ;

Serpico, C ;

Coppola, G ;

Mayergoyz, ID ;

Bertotti, G .

JOURNAL OF APPLIED PHYSICS, 2006, 99 (08)

[8] Current-Driven Hysteretic Synchronization in Vortex Nanopillar Spin-Transfer Oscillators [J].

d'Aquino, Massimiliano ;

Perna, Salvatore ;

Quercia, Antonio ;

Scalera, Valentino ;

Serpico, Claudio .

IEEE MAGNETICS LETTERS, 2017, 8

[9] Field dependence of spin-transfer-induced vortex dynamics in the nonlinear regime [J].

Dussaux, A. ;

Khvalkovskiy, A. V. ;

Bortolotti, P. ;

Grollier, J. ;

Cros, V. ;

Fert, A. .

PHYSICAL REVIEW B, 2012, 86 (01)

[10] Large microwave generation from current-driven magnetic vortex oscillators in magnetic tunnel junctions [J].

Dussaux, A. ;

Georges, B. ;

Grollier, J. ;

Cros, V. ;

Khvalkovskiy, A. V. ;

Fukushima, A. ;

Konoto, M. ;

Kubota, H. ;

Yakushiji, K. ;

Yuasa, S. ;

Zvezdin, K. A. ;

Ando, K. ;

Fert, A. .

NATURE COMMUNICATIONS, 2010, 1

← 1 2 3 4 →