Damping and magnetic anisotropy of ferromagnetic GaMnAs thin films

Details Damping and magnetic anisotropy of ferromagnetic GaMnAs thin films Damping and magnetic anisotropy of ferromagnetic GaMnAs thin films

2008-09-26

arxiv.org/abs/0809.4644v2

Physics

Condensed Matter

Materials Science

23 pages, 2 tables, 13 figures,

Scientific paper

The magnetic properties of annealed, epitaxial Ga0.93Mn0.07As layers under tensile and compressive stress have been investigated by X-band (9GHz) and Q-band (35GHz) ferromagnetic resonance (FMR) spectroscopy. From the analysis of the linewidths of the uniform mode spectra the FMR Gilbert damping factor "alpha" has been determined. At T=4K we obtain a minimum damping factor of "alpha" = 0.003 for the compressively stressed layer. Its value is not isotropic. It has a minimum value for the easy axes orientations of the magnetic field and increases with the measuring temperature. Its average value is for both type of films of the order of 0.01 in spite of strong differences in the inhomogeneous linewidth which vary between 20 Oe and 600 Oe for the layers grown on GaAs and GaInAs substrates respectively.

Affiliated with

Also associated with

No associations

Rating

Damping and magnetic anisotropy of ferromagnetic GaMnAs thin films does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Damping and magnetic anisotropy of ferromagnetic GaMnAs thin films, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Damping and magnetic anisotropy of ferromagnetic GaMnAs thin films will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-712951