Fast switching of magnetization in the ferromagnetic semiconductor (Ga,Mn)(As,P) using nonequilibrium phonon pulses

Autor:	Anthony J. Kent, E. De Ranieri, Paul M. Walker, B. L. Gallagher, A. V. Akimov, K. W. Edmonds, Arianna Casiraghi, A. W. Rushforth, R. P. Campion
Rok vydání:	2011
Předmět:	Magnetization Magnetic anisotropy chemistry.chemical_compound Materials science Physics and Astronomy (miscellaneous) Ferromagnetism Condensed matter physics chemistry Phonon Femtosecond Magnetic semiconductor Excitation Gallium arsenide
Zdroj:	Applied Physics Letters. 99:262503
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.3672029
Popis:	We use short acoustic pulses to induce a fast irreversible switching of the magnetization orientation in a layer of (Ga,Mn)(As,P). The pulses are generated by femtosecond optical excitation of a metal transducer film and travel ballistically through the sample. We show that the switching is triggered by incoherent acoustic phonons, occurs through domain-related processes, and is concluded in ∼35 ns. We suggest that the mechanism behind the switching involves the holes in the material being heated due to their coupling to the phonons.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::be5250fe6f0030514a2537bda2b8ad8b https://doi.org/10.1063/1.3672029 Zobrazit plný text záznamu