Broadband ferromagnetic resonance characterization of GaMnAs thin films

Aymen Ben Hamida; Sibylle Sievers; Klaus Pierz; Hans Werner Schumacher

doi:10.1063/1.4823740

Broadband ferromagnetic resonance characterization of GaMnAs thin films

Mesoscale and Nanoscale Physics 2015-06-16 v1

Authors: Aymen Ben Hamida , Sibylle Sievers , Klaus Pierz , Hans Werner Schumacher

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

The precessional magnetization dynamics of GaMnAs thin films are characterized by broadband network analyzer ferromagnetic resonance (FMR) in a coplanar geometry at cryogenic temperatures. The FMR frequencies are characterized as function of in-plane field angle and field amplitude. Using an extended Kittel model of the FMR dispersion the magnetic film parameters such as saturation magnetization and anisotropies are derived. The modification of the FMR behavior and of the magnetic parameters of the thin film upon annealing is analyzed.

Keywords

ferromagnetic resonance GaMnAs thin films magnetization dynamics Kittel model magnetic anisotropy annealing effects coplanar geometry

Cite

@article{arxiv.1308.1232,
  title  = {Broadband ferromagnetic resonance characterization of GaMnAs thin films},
  author = {Aymen Ben Hamida and Sibylle Sievers and Klaus Pierz and Hans Werner Schumacher},
  journal= {arXiv preprint arXiv:1308.1232},
  year   = {2015}
}

Comments

4 pages, 4 figures, 1 table

Related papers

View all related →

Mesoscale and Nanoscale Physics · Physics

Ferromagnetic resonance in thin ferromagnetic film with surface anisotropy