Effects of light-irradiation on spin-glass state and magnetoresistive properties of Zn0.5Co0.5Fe2O4 spinel ferrite films

Authors
Muraoka, Y Tabata, H Kawai, T
Citation
Y. Muraoka et al., Effects of light-irradiation on spin-glass state and magnetoresistive properties of Zn0.5Co0.5Fe2O4 spinel ferrite films, SOL ST COMM, 120(5-6), 2001, pp. 255-258
Citations number
16
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SOLID STATE COMMUNICATIONS
ISSN journal
00381098 → ACNP
Volume
120
Issue
5-6
Year of publication
2001
Pages
255 - 258
Database
ISI
SICI code
0038-1098(2001)120:5-6<255:EOLOSS>2.0.ZU;2-E
Abstract
Spin-glass spinel ferrite Zn0.5Co0.5Fe2O4 films were prepared on alpha -Al2 O3(0001) substrates and the effect of light-irradiation on the spin-glass s tate was studied. The magnetization of prepared films showed a broad maximu m at 260 K in a zero-field-cooled (ZFC) process, which is characteristic of a spin glass or a cluster glass. When shining light on the film under H = 1 kOe, the magnetization in the ZFC process increased, and returned to its original level when the light was turned off. This switching behavior was c onfirmed to work even at 350 K. magnetoresistance (MR) and photo-induced MR effects of this film are also described. (C) 2001 Elsevier Science Ltd. Al l rights reserved.