Ultrafast Photoinduced Softening in a III-V Ferromagnetic Semiconductor for Non-thermal Magneto-Optical Recording

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Through time-resolved two-color magneto-optical Kerr spectroscopy we have demonstrated that photogenerated transient carriers decrease the coercivity of ferromagnetic InMnAs at low temperatures. This transient ``softening'' persists only during the carrier lifetime ($\sim$ 2 ps) and returns to its original value as soon as the carriers recombine to disappear. We discuss the origin of this unusual phenomenon in terms of carrier-enhanced ferromagnetic exchange interactions between Mn ions and propose an entirely nonthermal scheme for magnetization reversal.
4 pages, 3 figures, changed title, revised

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Materials Science, Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/21334

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0305017
 http://arxiv.org/abs/cond-mat/0305017

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arXiv