Combined laser-magnetic field treatment of Y3Fe5O12 films grown by spray pyrolysis from Y-Fe citric complex initial solutions

Naiden I. Mihailov; Roumiana Todorovska; Stefka Groudeva-Zotova; Orlin I. Vankov; Chavdar Ghelev; Dimiter Todorovsky

doi:10.1117/12.425157

9 April 2001 Combined laser-magnetic field treatment of Y₃Fe₅O₁₂ films grown by spray pyrolysis from Y-Fe citric complex initial solutions

Naiden I. Mihailov, Roumiana Todorovska, Stefka Groudeva-Zotova, Orlin I. Vankov, Chavdar Ghelev, Dimiter Todorovsky

Author Affiliations +

Proceedings Volume 4397, 11th International School on Quantum Electronics: Laser Physics and Applications; (2001) https://doi.org/10.1117/12.425157
Event: 11th International School on Quantum Electronics: Laser Physics and Applications, 2000, Varna, Bulgaria

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.

Citation Download Citation

Naiden I. Mihailov, Roumiana Todorovska, Stefka Groudeva-Zotova, Orlin I. Vankov, Chavdar Ghelev, and Dimiter Todorovsky "Combined laser-magnetic field treatment of Y₃Fe₅O₁₂ films grown by spray pyrolysis from Y-Fe citric complex initial solutions", Proc. SPIE 4397, 11th International School on Quantum Electronics: Laser Physics and Applications, (9 April 2001); https://doi.org/10.1117/12.425157

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