Coherent Magnetization Precession in GaMnAs induced by Ultrafast Optical Excitation

Physics – Condensed Matter – Materials Science

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

7 pages,3 figures

Scientific paper

10.1063/1.2785114

We use femtosecond optical pulses to induce, control and monitor magnetization precession in ferromagnetic Ga0.965Mn0.035As. At temperatures below ~40 K we observe coherent oscillations of the local Mn spins, triggered by an ultrafast photoinduced reorientation of the in-plane easy axis. The amplitude saturation of the oscillations above a certain pump intensity indicates that the easy axis remains unchanged above ~TC/2. We find that the observed magnetization precession damping (Gilbert damping) is strongly dependent on pump laser intensity, but largely independent on ambient temperature. We provide a physical interpretation of the observed light-induced collective Mn-spin relaxation and precession.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Coherent Magnetization Precession in GaMnAs induced by Ultrafast Optical Excitation 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 Coherent Magnetization Precession in GaMnAs induced by Ultrafast Optical Excitation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coherent Magnetization Precession in GaMnAs induced by Ultrafast Optical Excitation will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-457111

All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.