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

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.
Authors:
;  [1] ;  [2] ;  [3] ;  [1] ;  [4]
  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)
  4. (Russian Federation)
Publication Date:
OSTI Identifier:
22486092
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 20; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CURRENTS; LIGHT SCATTERING; MICROWAVE RADIATION; OSCILLATIONS; OSCILLATORS; RESOLUTION; SPECTROSCOPY; SPIN; TEMPERATURE RANGE 0273-0400 K