6 July 1999 Polycrystalline SrFe12O19 thin films grown by pulsed laser deposition
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Proceedings Volume 3572, 3rd Iberoamerican Optics Meeting and 6th Latin American Meeting on Optics, Lasers, and Their Applications; (1999) https://doi.org/10.1117/12.358345
Event: 3rd Iberoamerican Optics Meeting and 6th Latin American Meeting on Optics, Lasers, and Their Applications, 1998, Cartagena de Indias, Colombia
Abstract
Polycrystalline SrFe12O19 thin films were deposited on Si (100) substrates by PLD using a Nd-YAG laser ((lambda) equals 1064 nm). During the deposition process substrates were kept at room temperature. As-deposited films were annealed in air at temperatures between 600 degree(s)C and 840 degree(s)C. Samples were characterized by AES, ESCA, SEM, AFM, x-ray diffraction and VSM. It is presented the relevance of the preparation of the target surface on the film quality. Some differences in the chemical composition of as-deposited films, compared with the target and the annealed films, were observed. The x-ray diffraction spectra show a textured as- deposited films. Samples annealed at 600 degree(s)C, and below, showed a very weak magnetic response. In contrast annealing in the temperature range 700 degree(s)C - 840 degree(s)C led to the formation of a nanocrystalline particle system (average particle size 150 - 350 nm) which behave as a single domain in the thermally demagnetized state. The obtained coercivities (5750 - 6850 Oe) are among the highest values reported for films, powders and sintered samples.
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Tupac Garcia, Tupac Garcia, E. de Posada, E. de Posada, Ernesto Jimenez, Ernesto Jimenez, J. L. Sanchez Ll., J. L. Sanchez Ll., S. Diaz Castanon, S. Diaz Castanon, Pascual Bartolo-Perez, Pascual Bartolo-Perez, W. Cauich, W. Cauich, I. Oliva, I. Oliva, J. L. Pena, J. L. Pena, O. Ceh, O. Ceh, "Polycrystalline SrFe12O19 thin films grown by pulsed laser deposition", Proc. SPIE 3572, 3rd Iberoamerican Optics Meeting and 6th Latin American Meeting on Optics, Lasers, and Their Applications, (6 July 1999); doi: 10.1117/12.358345; https://doi.org/10.1117/12.358345
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