Title :
Improvements of magnetic properties of Sr ferrite magnets by substitutions of La and Co
Author :
Ogata, Yasunobu ; Kubota, Yutaka ; Takami, Takashi ; Tokunaga, Masaaki ; Shinokara, T.
Author_Institution :
Magnetic & Electron. Mater. Res. Lab., Hitachi Metals Ltd., Saitama, Japan
fDate :
9/1/1999 12:00:00 AM
Abstract :
The effect of the simultaneous partial substitution of Co2+ for Fe3+ and of La3+ for Sr2+ 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
Keywords :
Curie temperature; coercive force; ferrites; lanthanum compounds; magnetic hysteresis; strontium compounds; Co2+; Fe3+; La-Co substitution; La3+; Sr ferrite magnets; Sr2+; coercive force; magnetic properties; partial substitution; residual flux density; temperature coefficients of coercive force; Anisotropic magnetoresistance; Coercive force; Composite materials; Ferrites; Magnetic materials; Magnetic properties; Magnets; Powders; Strontium; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
