Spectral linewidth of spin-current nano-oscillators driven by nonlocal spin injection

Journal Article · Mon Nov 16 00:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4936153· OSTI ID:22486092

Divinskiy, B. ^[1]; Urazhdin, S. ^[2]; Rinkevich, A. B. ^[3]; Demokritov, S. O. ^[1]

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1. Institute for Applied Physics and Center for Nonlinear Science, University of Muenster, Corrensstrasse 2-4, 48149 Muenster (Germany)
2. Department of Physics, Emory University, Atlanta, Georgia 30322 (United States)
3. M. N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, Yekaterinburg 620041 (Russian Federation)

We study experimentally the auto-oscillation characteristics of magnetic nano-oscillators driven by pure spin currents generated by nonlocal spin injection. By combining micro-focus Brillouin light scattering spectroscopy with electronic microwave spectroscopy, we are able to simultaneously perform both the spatial and the high-resolution spectral analyses of auto-oscillations induced by spin current. We find that the devices exhibit a highly coherent dynamics with the spectral linewidth of a few megahertz at room temperature. This narrow linewidth can be achieved over a wide range of operational frequencies, demonstrating a significant potential of nonlocal oscillators for applications.

• OSTI ID: 22486092
• Journal Information: Applied Physics Letters, Vol. 107, Issue 20; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CURRENTS
LIGHT SCATTERING
MICROWAVE RADIATION
OSCILLATIONS
OSCILLATORS
RESOLUTION
SPECTROSCOPY
SPIN
TEMPERATURE RANGE 0273-0400 K