skip to main content

Title: Current-driven antivortex core resonance measured by the rectifying effect

We demonstrate the current-driven resonance of a single antivortex core confined in a cross-shaped Ni{sub 81}Fe{sub 19} wire. The antivortex core dynamics can be excited purely by spin transfer torque; therefore, it is significant to understand the current-induced magnetization dynamics. The antivortex core resonance can be measured from the frequency dependence of a rectified voltage generated by an alternating current application. We found that the resonance frequency and peak amplitude greatly depend on the external magnetic field. This result is in good agreement with micromagnetic simulation.
Authors:
 [1] ;  [2]
  1. Graduate School of Engineering Science, Osaka University, J205, 1-3, Machikaneyamacho, Toyonaka, Osaka, 560-8531 (Japan)
  2. Department of Physics, Keio University, 22-102, 3-14-1, Hiyoshi, Kohokuku, Yokohama, Kanagawa, 223-8522 (Japan)
Publication Date:
OSTI Identifier:
22492441
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 6; Journal Issue: 2; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALTERNATING CURRENT; AMPLITUDES; ELECTRIC POTENTIAL; FREQUENCY DEPENDENCE; IRON ALLOYS; MAGNETIC FIELDS; MAGNETISM; MAGNETIZATION; NICKEL BASE ALLOYS; RESONANCE; SPIN; TORQUE