TITLE

Blueshifted Kerr effects and enhanced reflectivity in nanocrystalline CoFe[sub 2-x]Al[sub x]O[sub 4] thin films

AUTHOR(S)
Zhou, Biao; Zhang, Ya-Wen; Liao, Chun-Sheng; Yu, Yue-Jun; Yan, Chun-Hua; Chen, Liang-Yao; Wang, Song-You
PUB. DATE
February 2003
SOURCE
Applied Physics Letters;2/24/2003, Vol. 82 Issue 8, p1188
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The doping effects of Al[SUP3+] on the microstructure, magnetism, polar magneto-optical Kerr effects, and optical property of the sol-gel derived nanocrystalline CoFe[SUB2-x]Al[SUBx]O[SUB4] (x=0-1.0) thin films on silicon substrate were investigated. Doping of Al[SUP3+] not only led to the existence of two Kerr rotation peaks at 620 and 550 nm associated with the crystal-field transition, but also aroused the blueshifting of another peak at 540 nm correlated with the intervalence charge transfer transition. On the other hand, the reflectivity of as-deposited films increased with the Al[SUP3+] content x (except x=0.2) due to the decreased light scatter and absorptivity of Al[SUP3+] in substitution of Fe[SUP3+]. Both the blueshifted Kerr effects and enhanced reflectivity in these films are of much benefit to magneto-optical recording.
ACCESSION #
9140764

 

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