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Title: A generalized tool for accurate time-domain separation of excited modes in spin-torque oscillators

We propose and develop an advanced signal processing technique that, combined with micromagnetic simulations, is able to deeply describe the non-stationary behavior of spin-torque oscillators, both in terms of time domain and spatial distribution of the magnetization dynamics. The Hilbert-Huang Transform is used for the identification of the time traces of each oscillation in a multimode excitation and enhanced with masking signals and the Ensemble Empirical Mode Decomposition. We emphasize that the technique developed here is general and can be used for any physical non-linear system in the presence of multimode dynamical excitation or intermittence.
Authors:
; ;  [1] ;  [2]
  1. Department of Electronic Engineering, Industrial Chemistry and Engineering, University of Messina, C.da Di Dio s/n, 98166 Messina (Italy)
  2. Department of Informatic Engineering and Telecommunications, University of Catania, Viale Andrea Doria 6, 95125 Catania (Italy)
Publication Date:
OSTI Identifier:
22273931
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; 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; COMPUTERIZED SIMULATION; DATA PROCESSING; EXCITATION; MAGNETIC MATERIALS; MAGNETISM; MAGNETIZATION; NONLINEAR PROBLEMS; OSCILLATIONS; OSCILLATORS; SPATIAL DISTRIBUTION; SPIN; TORQUE