Time-resolved ferromagnetic resonance in epitaxial Fe1-xCox films

D. M. Engebretson; S. Zellinger; L. C. Chen; C. J. Palmstrom; P. A. Crowell

doi:10.1063/1.1450817

Time-resolved ferromagnetic resonance in epitaxial Fe1-xCox films

Materials Science 2009-11-07 v1

Authors: D. M. Engebretson , S. Zellinger , L. C. Chen , C. J. Palmstrom , P. A. Crowell

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

Magnetodynamics in epitaxial Fe1-xCox films on GaAs (100) are studied using time-resolved ferromagnetic resonance, in which the free precession of the magnetization after an impulsive excitation is measured using the polar Kerr effect. The sample is rotated with respect to the static and pulsed field directions, providing a complete mapping of the free energy surface and characteristic relaxation times. The magnetic response can be simulated with a simple coherent rotation model except in the immediate vicinity of switching fields. Bulk and surface anisotropies are identified, and unusual dynamics associated with the coexistence of cubic and uniaxial anisotropies are observed.

Keywords

time-resolved ferromagnetic resonance epitaxial Fe1-xCo films polar Kerr effect free energy surface coherent rotation model

Cite

@article{arxiv.cond-mat/0105513,
  title  = {Time-resolved ferromagnetic resonance in epitaxial Fe1-xCox films},
  author = {D. M. Engebretson and S. Zellinger and L. C. Chen and C. J. Palmstrom and P. A. Crowell},
  journal= {arXiv preprint arXiv:cond-mat/0105513},
  year   = {2009}
}

Comments

PDF - 4 figures

Time-resolved ferromagnetic resonance in epitaxial Fe1-xCox films

Abstract

Keywords

Cite

Comments

Related papers