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Title: Improvements of magnetic properties of Sr ferrite magnets by substitutions of La and Co

Abstract

Recently, it is intensively required to improve the magnetic properties of Sr ferrite magnets in order to decrease the weight of motors used in automobiles and to improve the efficiency of motors used in electric appliances such as air conditioners. The effect of the simultaneous partial substitution of Co{sup 2+} for Fe{sup 3+} and of La{sup 3+} for Sr{sup 2+} ion in Sr ferrite on the magnetic properties of anisotropic Sr ferrite magnets was investigated. It was found that the coercive force of Sr ferrite magnets is increased without significant decrease in residual flux density by La-Co substitution. Temperature coefficients of coercive force were found to be also improved by La-Co substitution.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Hitachi Metals, Ltd., Mikajiri, Kumagaya, Saitama (JP)
OSTI Identifier:
20000767
Resource Type:
Journal Article
Journal Name:
IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)
Additional Journal Information:
Journal Volume: 35; Journal Issue: 5Pt2; Conference: 1999 international magnetics conference (Intermag '99), Kyongju (KR), 05/18/1999--05/21/1999; Other Information: PBD: Sep 1999; Journal ID: ISSN 0018-9464
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; IRON OXIDES; STRONTIUM OXIDES; LANTHANUM OXIDES; COBALT OXIDES; METALLURGICAL EFFECTS; MAGNETIC PROPERTIES; PERMANENT MAGNETS; COERCIVE FORCE

Citation Formats

Ogata, Yasunobu, Kubota, Yutaka, Takami, Takashi, Tokunaga, Masaaki, and Shinohara, Tadashi. Improvements of magnetic properties of Sr ferrite magnets by substitutions of La and Co. United States: N. p., 1999. Web. doi:10.1109/20.800516.
Ogata, Yasunobu, Kubota, Yutaka, Takami, Takashi, Tokunaga, Masaaki, & Shinohara, Tadashi. Improvements of magnetic properties of Sr ferrite magnets by substitutions of La and Co. United States. doi:10.1109/20.800516.
Ogata, Yasunobu, Kubota, Yutaka, Takami, Takashi, Tokunaga, Masaaki, and Shinohara, Tadashi. Wed . "Improvements of magnetic properties of Sr ferrite magnets by substitutions of La and Co". United States. doi:10.1109/20.800516.
@article{osti_20000767,
title = {Improvements of magnetic properties of Sr ferrite magnets by substitutions of La and Co},
author = {Ogata, Yasunobu and Kubota, Yutaka and Takami, Takashi and Tokunaga, Masaaki and Shinohara, Tadashi},
abstractNote = {Recently, it is intensively required to improve the magnetic properties of Sr ferrite magnets in order to decrease the weight of motors used in automobiles and to improve the efficiency of motors used in electric appliances such as air conditioners. The effect of the simultaneous partial substitution of Co{sup 2+} for Fe{sup 3+} and of La{sup 3+} for Sr{sup 2+} ion in Sr ferrite on the magnetic properties of anisotropic Sr ferrite magnets was investigated. It was found that the coercive force of Sr ferrite magnets is increased without significant decrease in residual flux density by La-Co substitution. Temperature coefficients of coercive force were found to be also improved by La-Co substitution.},
doi = {10.1109/20.800516},
journal = {IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)},
issn = {0018-9464},
number = 5Pt2,
volume = 35,
place = {United States},
year = {1999},
month = {9}
}