Permanent local modification of the magnetic bubble properties of epitaxial garnet films by laser annealing
作者:
L. Schultz,
E. A. Giess,
R. T. Hodgson,
T. O. Sedgwick,
期刊:
Journal of Applied Physics
(AIP Available online 1979)
卷期:
Volume 50,
issue 9
页码: 5902-5905
ISSN:0021-8979
年代: 1979
DOI:10.1063/1.326688
出版商: AIP
数据来源: AIP
摘要:
Ga‐substituted magnetic garnet films are laser annealed with annealing times of several milliseconds by scanning a cw argon laser beam across the film. Locally the bubble collapse field and the saturation magnetization increase, and the domain width decreases permanently unless conventional furnace annealing is used to restore the material to its initial state. We attribute the observed effects to a crystallographic site redistribution of the Ga and the Fe atoms in annealed regions which support mobile bubbles. The site distribution is changed from a state quenched in from the growth temperature to a higher‐temperature state representative of the laser‐annealing treatment. The effect does not involve melting.
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