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Title: High sensitivity microwave detection using a magnetic tunnel junction in the absence of an external applied magnetic field

In the absence of any external applied magnetic field, we have found that a magnetic tunnel junction (MTJ) can produce a significant output direct voltage under microwave radiation at frequencies, which are far from the ferromagnetic resonance condition, and this voltage signal can be increase by at least an order of magnitude by applying a direct current bias. The enhancement of the microwave detection can be explained by the nonlinear resistance/conductance of the MTJs. Our estimation suggests that optimized MTJs should achieve sensitivities for non-resonant broadband microwave detection of about 5000 mV/mW.
Authors:
; ;  [1] ; ;  [2] ; ; ;  [3] ;  [4]
  1. Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2 (Canada)
  2. Department of Physics, Center for the Physics of Materials, McGill University, Montreal, Quebec H3A 2T8 (Canada)
  3. Ecole Polytechnique de Montreal, Montreal, Quebec H3T 1J4 (Canada)
  4. Everspin Technologies, 1347 N. Alma School Road, Chandler, Arizona 85224 (United States)
Publication Date:
OSTI Identifier:
22398899
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 15; 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; DETECTION; DIRECT CURRENT; ELECTRIC CONDUCTIVITY; ELECTRIC POTENTIAL; FERROMAGNETIC RESONANCE; MAGNETIC FIELDS; MAGNETISM; MICROWAVE RADIATION; NONLINEAR PROBLEMS; SENSITIVITY; SIGNALS; TUNNEL EFFECT