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Proceedings Paper

Combined laser-magnetic field treatment of Y3Fe5O12 films grown by spray pyrolysis from Y-Fe citric complex initial solutions
Author(s): Naiden I. Mihailov; Roumiana Todorovska; Stefka Groudeva-Zotova; Orlin I. Vankov; Chavdar Ghelev; Dimiter Todorovsky
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Paper Abstract

Thin films (250 nm - 1200 nm) of cubic Y3Fe5O12 (YIG) were deposited on fused silica and monocrystal Y3Al5O12 (YAG) 100 substrates by spray pyrolysis (using ethylene glycol solutions of Y-Fe(III)-citric complexes) and additionally annealed at 950 degrees Celsius in static air for 2 h. The films were afterwards irradiated by a free-running Nd-YAG laser (pulse energy 650 mJ, pulse duration 700 microseconds, energy density 100 mJ/cm2) whose onset was synchronized with that of a magnetic field pulse of nearly-square shape (magnetic induction 0.5 T, pulse duration 900 microsecond). The samples were placed normally to the direction of the magnetic field. The temperature reached at the film surface was estimated to be as high as the melting point, considerably higher than the Curie temperature. The laser-magnetic field treatment causes: a sharp weakening of the YIG/YAG films texturation, highly textured before that treatment; an increase of the crystallites size; change in the phase composition of the YIG/silica films; an increase of the magnetization by more than 45%; an increase (in the case of YIG/silica) and decrease (in the case of YIG/YAG) of the coercive force.

Paper Details

Date Published: 9 April 2001
PDF: 5 pages
Proc. SPIE 4397, 11th International School on Quantum Electronics: Laser Physics and Applications, (9 April 2001); doi: 10.1117/12.425157
Show Author Affiliations
Naiden I. Mihailov, Institute of Electronics (Bulgaria)
Roumiana Todorovska, Institute of Electronics (Bulgaria)
Stefka Groudeva-Zotova, Institute of Electronics (Bulgaria)
Orlin I. Vankov, Institute of Electronics (Bulgaria)
Chavdar Ghelev, Institute of Electronics (Bulgaria)
Dimiter Todorovsky, Univ. of Sofia (Bulgaria)

Published in SPIE Proceedings Vol. 4397:
11th International School on Quantum Electronics: Laser Physics and Applications
Peter A. Atanasov; Stefka Cartaleva, Editor(s)

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