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Title: Microwave generation by spin Hall nanooscillators with nanopatterned spin injector

We experimentally study spin Hall nano-oscillators based on Pt/ferromagnet bilayers with nanopatterned Pt spin injection layer. We demonstrate that both the spectral characteristics and the electrical current requirements can be simultaneously improved by reducing the spin injection area. Moreover, devices with nanopatterned Pt spin injector exhibit microwave generation over a wide temperature range that extends to room temperature. Studies of devices with additional Pt spacers under the device electrodes show that the oscillation characteristics are affected not only by the spin injection geometry but also by the effects of Pt/ferromagnet interface on the dynamical properties of the ferromagnet.
Authors:
;  [1]
  1. Department of Physics, Emory University, Atlanta, Georgia 30322 (United States)
Publication Date:
OSTI Identifier:
22303519
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ELECTRIC CURRENTS; ELECTRODES; INJECTION; INTERFACES; LAYERS; MICROWAVE RADIATION; OSCILLATIONS; OSCILLATORS; PLATINUM; SPACERS; SPIN; TEMPERATURE RANGE 0273-0400 K