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Title: Skyrmion based microwave detectors and harvesting

Magnetic skyrmions are topologically protected states that are very promising for the design of the next generation of ultra-low-power electronic devices. In this letter, we propose a magnetic tunnel junction based spin-transfer torque diode with a magnetic skyrmion as ground state and a perpendicular polarizer patterned as nano-contact for a local injection of the current. The key result is the possibility to achieve sensitivities (i.e., detection voltage over input microwave power) larger than 2000 V/W for optimized contact diameters. We also pointed out that large enough voltage controlled magnetocrystalline anisotropy could significantly improve the sensitivity. Our results can be very useful for the identification of a class of spin-torque diodes with a non-uniform ground state and to understand the fundamental physics of the skyrmion dynamical properties.
Authors:
;  [1] ; ;  [2] ; ;  [3] ; ;  [4] ;  [5]
  1. Department of Mathematical and Computer Sciences, Physical Sciences and Earth Sciences, University of Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina (Italy)
  2. Department of Engineering, Polo Scientifico Didattico di Terni, University of Perugia, Terni, TR I-50100 (Italy)
  3. Department of Computer Science, Modelling, Electronics and System Science, University of Calabria, via P. Bucci 41C, I-87036 Rende (CS) (Italy)
  4. Department of Engineering, University of Messina, c.da di Dio, I-98166 Messina (Italy)
  5. Department of Electrical and Information Engineering, Politecnico di Bari, via E. Orabona 4, I-70125 Bari (Italy)
Publication Date:
OSTI Identifier:
22486309
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 26; 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; ELECTRIC POTENTIAL; ELECTRONIC EQUIPMENT; GROUND STATES; MICROWAVE RADIATION; SENSITIVITY; SKYRME POTENTIAL; SOLITONS; SPIN; TUNNEL EFFECT