Dynamical Mode Coupling and Coherence in a Spin Hall Nano-Oscillator with Perpendicular Magnetic Anisotropy

被引：23

作者：

Chen, Lina ^{[1
,2
]}

Urazhdin, S. ^{[3
]}

Du, Y. W. ^{[1
,2
]}

Liu, R. H. ^{[1
,2
,3
]}

机构：

[1] Nanjing Univ, Sch Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[2] Nanjing Univ, Sch Phys, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[3] Emory Univ, Dept Phys, Atlanta, GA 30322 USA

来源：

PHYSICAL REVIEW APPLIED | 2019年 / 11卷 / 06期

基金：

中国国家自然科学基金;

关键词：

DRIVEN; MULTILAYER; EXCITATION;

D O I：

10.1103/PhysRevApplied.11.064038

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We experimentally study the dynamical modes excited by spin current in spin Hall nano-oscillators based on Pt/[Co/Ni] multilayers with perpendicular magnetic anisotropy. Both propagating spin-wave and localized solitonic modes of the oscillation are achieved and controlled by varying the applied magnetic field and current. At room temperature, the generation linewidth broadening associated with mode hopping is observed at currents close to the transition between different modes and in the mode-coexistence regimes. The mode hopping is suppressed at cryogenic temperatures, confirming that the coupling between modes is mediated by thermal-magnon-mediated scattering. We also demonstrate that coherent single-mode oscillations with a linewidth of 5 MHz can be achieved without applying an external magnetic field. Our results provide insight into the mechanisms controlling the dynamical coherence in nanomagnetic oscillators and guidance for optimizing their applications in spin-wave-based electronics.

引用

页数：8

共 41 条

[1]

Awad AA, 2017, NAT PHYS, V13, P292, DOI [10.1038/NPHYS3927, 10.1038/nphys3927]

[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] Temperature dependence of microwave voltage emission associated to spin-transfer induced vortex oscillation in magnetic tunnel junction [J].

Bortolotti, P. ;

Dussaux, A. ;

Grollier, J. ;

Cros, V. ;

Fukushima, A. ;

Kubota, H. ;

Yakushiji, K. ;

Yuasa, S. ;

Ando, K. ;

Fert, A. .

APPLIED PHYSICS LETTERS, 2012, 100 (04)

[4] OSCILLATORY EFFECTS AND THE MAGNETIC-SUSCEPTIBILITY OF CARRIERS IN INVERSION-LAYERS [J].

BYCHKOV, YA ;

RASHBA, EI .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1984, 17 (33) :6039-6045

[5] Tailoring the chirality of magnetic domain walls by interface engineering [J].

Chen, Gong ;

Ma, Tianping ;

N'Diaye, Alpha T. ;

Kwon, Heeyoung ;

Won, Changyeon ;

Wu, Yizheng ;

Schmid, Andreas K. .

NATURE COMMUNICATIONS, 2013, 4

[6] PREDICTION AND CONFIRMATION OF PERPENDICULAR MAGNETIC-ANISOTROPY IN CO/NI MULTILAYERS [J].

DAALDEROP, GHO ;

KELLY, PJ ;

DENBROEDER, FJA .

PHYSICAL REVIEW LETTERS, 1992, 68 (05) :682-685

[7] Magnetization oscillations and waves driven by pure spin currents [J].

Demidov, V. E. ;

Urazhdin, S. ;

de Loubens, G. ;

Klein, O. ;

Cros, V. ;

Anane, A. ;

Demokritov, S. O. .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2017, 673 :1-31

[8] Direct observation of dynamic modes excited in a magnetic insulator by pure spin current [J].

Demidov, V. E. ;

Evelt, M. ;

Bessonov, V. ;

Demokritov, S. O. ;

Prieto, J. L. ;

Munoz, M. ;

Ben Youssef, J. ;

Naletov, V. V. ;

de Loubens, G. ;

Klein, O. ;

Collet, M. ;

Bortolotti, P. ;

Cros, V. ;

Anane, A. .

SCIENTIFIC REPORTS, 2016, 6

[9] Nanoconstriction-based spin-Hall nano-oscillator [J].

Demidov, V. E. ;

Urazhdin, S. ;

Zholud, A. ;

Sadovnikov, A. V. ;

Demokritov, S. O. .

APPLIED PHYSICS LETTERS, 2014, 105 (17)

[10]

Demidov VE, 2012, NAT MATER, V11, P1028, DOI [10.1038/NMAT3459, 10.1038/nmat3459]

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