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Magnetic and Magneto-Optical Properties of Al Substituted Bi-RIG Particles Dispersed in a Plastic Binder

Published online by Cambridge University Press:  10 February 2011

T. Hirano ,
K. Yoshida ,
Y. Yamazaki ,
T. Namikawa  and
M. Kishi
T. Hirano
Affiliation:
Material Research Laboratory, Toppan Printing, Co., Ltd. TRI, Saitama, 345-8508 Japan
K. Yoshida
Affiliation:
Material Research Laboratory, Toppan Printing, Co., Ltd. TRI, Saitama, 345-8508 Japan
Y. Yamazaki
Affiliation:
Tokyo Inst. Tech., Yokohama, 226-8502, Japan
T. Namikawa
Affiliation:
Tokyo Inst. Tech., Yokohama, 226-8502, Japan
M. Kishi
Affiliation:
Tokyo Inst. Tech., Yokohama, 226-8502, Japan
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Abstract

Nano-size R2BiAlxFe5-xO12 (R: Dy, Gd, Th) particles were prepared with a coprecipitation and annealing method. The coating films of the particles were prepared with a coating technique. The magnetic and magneto-optical properties of the particles and films were investigated. The coercive force Hc of the particles and films was increased and saturation magnetization Ms. dropped with the Al content x. The Hc of the coating films was about 200 Oe at the compositions of dispersed particles for which the Ms was almost zero. These results suggest that the increase was made with magnetic compensation. The BiTb2A10.6Fe4.4O12 coating film shows Faraday rotation spectra. The figure of merit of the film is about 0.5 at 520 nm. The coating BiTb2A10.6Fe4.4O12 film is one of the candidate materials for a new economical magneto-optical storage medium.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 517: Symposium F – Wide Bandgap Semiconductors for High Power, High Frequency , January 1998 , 577
Copyright
Copyright © Materials Research Society 1998

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References

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