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Title: Dynamic control of metastable remanent states in mesoscale magnetic elements

The formation of the vortex-antivortex-vortex (v-av-v) metastable remanent states in elongated magnetic elements have been systematically investigated using micromagnetic modeling. It is demonstrated that the v-av-v magnetization pattern can be effectively stabilized by exciting the single vortex state with an external RF field. Furthermore, we show that a set of different polarity combinations of the vortex cores can be achieved by adjusting the frequency and amplitude of the excitation field. The corresponding dynamic response in time- and frequency-domain has also been presented. Owing to the diversity of the collective modes with different vortex-antivortex combinations, this system may open promising perspectives in the area of spin transfer torque oscillators.
Authors:
; ; ;  [1] ;  [1] ;  [2] ;  [3] ;  [4]
  1. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
  2. (Spain)
  3. National University of Science and Technology “MISiS,” Moscow 119049 (Russian Federation)
  4. (Russian Federation)
Publication Date:
OSTI Identifier:
22403040
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; COMPUTERIZED SIMULATION; CONTROL; EXCITATION; FREQUENCY DEPENDENCE; MAGNETIC MATERIALS; MAGNETISM; MAGNETIZATION; METASTABLE STATES; OSCILLATORS; RADIOWAVE RADIATION; SPIN; TORQUE; VORTICES