TITLE

Laser-induced erasure and reversal of the permanent magnetization in a ferromagnet-dilute magnetic semiconductor hybrid structure

AUTHOR(S)
Fan, Y.-H.; Puls, J.; Halm, S.; Sadofev, S.; Seifert, F.; Schuster, E.; Bacher, G.; Keune, W.; Henneberger, F.
PUB. DATE
November 2009
SOURCE
Applied Physics Letters;11/30/2009, Vol. 95 Issue 22, p223502
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Manipulation of the magnetizations via laser pulse heating is studied for a hybrid structure, where the fringe field of a metallic ferromagnet controls remotely the carrier and magnetic ion spins in a diluted magnetic semiconductor quantum well. A single nanosecond pulse with an energy density of 160 pJ/μm2 is found to be sufficient to erase the ferromagnet magnetization. Applying a reversed external bias field about five times below the ferromagnet coercive field, a complete reversal of the magnetization via optical excitation is demonstrated.
ACCESSION #
45610566

 

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