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Title: Analysis of reliable sub-ns spin-torque switching under transverse bias magnetic fields

The switching process of a magnetic spin-valve nanosystem subject to spin-polarized current pulses is considered. The dependence of the switching probability on the current pulse duration is investigated. The further application of a transverse field along the intermediate anisotropy axis of the particle is used to control the quasi-random relaxation of magnetization to the reversed magnetization state. The critical current amplitudes to realize the switching are determined by studying the phase portrait of the Landau-Lifshtz-Slonczewski dynamics. Macrospin numerical simulations are in good agreement with the theoretical prediction and demonstrate reliable switching even for very short (below 100 ps) current pulses.
Authors:
 [1] ; ;  [2] ;  [3] ;  [4]
  1. Dipartimento di Ingegneria, Università di Napoli “Parthenope”, I-80143 Napoli (Italy)
  2. Dipartimento di Ingegneria Elettrica e delle Tecnologie dell'Informazione, Università di Napoli “Federico II”, I-80125 Napoli (Italy)
  3. Istituto Nazionale di Ricerca Metrologica (INRiM), I-10135 Torino (Italy)
  4. ECE Department and UMIACS, University of Maryland, College Park, Maryland 20742 (United States)
Publication Date:
OSTI Identifier:
22409972
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 17; 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; AMPLITUDES; ANISOTROPY; COMPUTERIZED SIMULATION; CRITICAL CURRENT; MAGNETIC FIELDS; MAGNETIZATION; PROBABILITY; PULSES; RANDOMNESS; RELAXATION; SPIN; SPIN ORIENTATION; TORQUE; VALVES