利用传统陶瓷工艺制备了化学式为Y3-aGdaFe5-b-cAlbMncO12的复合石榴石铁氧体,研究了Gd3+、Al3+和Mn3+复合取代对(YGdAlMn)IG铁氧体材料高功率特性的影响.结果表明,烧结试样的饱和磁化强度随着Gd3+、Al3+含量的增加而降低,其自旋波线宽、温度稳定性(10～180℃之间的温度系数为(-1.9～-2.8)×10-3(1/℃))随Gd3+含量的增加而增大;同时Mn3+取代可以明显提高电阻率、降低介电损耗.这些特性的改善对制备高功率石榴石铁氧体器件具有指导意义.
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