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Title: Large amplitude spin torque vortex oscillations at zero external field using a perpendicular spin polarizer

We investigate the microwave response of a spin transfer vortex based oscillator in a magnetic tunnel junction with an in-plane reference layer combined with a spin valve with an out-of-plane magnetization spin polarizing layer. The main advantage of this perpendicular spin polarizer is to induce a large spin transfer force even at zero magnetic field, thus leading to a record emitted power (up to 0.6 μW) associated to a very narrow spectral linewidth of a few hundreds of kHz. The characteristics of this hybrid vortex based spin transfer nano-oscillator obtained at zero field and room temperature are of great importance for applications based on rf spintronic devices as integrated and tunable microwave source and/or microwave detector.
Authors:
; ; ; ; ; ;  [1] ;  [1] ;  [2] ;  [1] ;  [3] ; ; ; ;  [4]
  1. Unité Mixte de Physique CNRS/Thales and Université Paris Sud 11, 1 Ave. A. Fresnel, 91767 Palaiseau (France)
  2. (France)
  3. (Russian Federation)
  4. National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba (Japan)
Publication Date:
OSTI Identifier:
22311084
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 2; 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; AMPLITUDES; EMISSION; LAYERS; MAGNETIC FIELDS; MAGNETIC PROPERTIES; MAGNETIZATION; MICROWAVE RADIATION; OSCILLATIONS; OSCILLATORS; SPIN ORIENTATION; TORQUE; TUNNEL DIODES; TUNNEL EFFECT; VORTICES