Dy^(3+)及Ca^(2+)-Ge^(4+)联合取代对石榴石铁氧体高功率低损耗特性的影响  

Effect of Dy^(3+)and Ca^(2+)-Ge^(4+)substitution on high-power and low-loss properties of garnet ferrites

作　　者：窦海之 倪鹤年 王宏 余忠 邬传健 孙科 李启帆 蒋晓娜 兰中文 DOU Hai-zhi;NI He-nian;WANG Hong;YU Zhong;WU Chuan-jian;SUN Ke;LI Qi-fan;JIANG Xiao-na;LAN Zhong-wen(Jiangxi Sunshine Electronic Co,Ltd,Yichun 336202,China;School of Materials and Energy,University of Electronic Science and Technology of China,Chengdu 610054,China)

机构地区：[1]江西尚朋电子科技有限公司,江西宜春336202 [2]电子科技大学材料与能源学院,四川成都610054

出　　处：《磁性材料及器件》2023年第4期13-18,共6页Journal of Magnetic Materials and Devices

摘　　要：采用传统陶瓷工艺制备Dy^(3+)和Ca^(2+)-Ge^(4+)取代的钇铁石榴石铁氧体,考察Dy^(3+)和Ca^(2+)-Ge^(4+)取代对材料显微结构、饱和磁化强度、铁磁共振线宽、自旋波线宽、电阻率等性能的影响。研究表明,Dy^(3+)取代24c位的Y^(3+),对样品显微结构、饱和磁化强度、电阻率和介电损耗无明显影响。随着Dy^(3+)取代量的增加,自旋波线宽从8.9 Oe提高到28.5 Oe。为了降低材料的损耗,采用适量的Ca^(2+)-Ge^(4+)取代24c位的Y^(3+)和24d位的Fe^(3+),铁磁共振线宽从162 Oe减小到102 Oe,自旋波线宽从15.3 Oe增大到22.5 Oe。此外,Ca^(2+)-Ge^(4+)取代对石榴石铁氧体的介电损耗影响不大,使其保持良好的介电性能。Dy^(3+)and Ca^(2+)-Ge^(4+)substituted yttrium iron garnet ferrites were prepared by traditional ceramic process.The effects of Dy^(3+)and Ca^(2+)-Ge^(4+)substitutions on the microstructure,saturation magnetization,ferromagnetic resonance linewidth,spin wave linewidth,and resistance of the garnet ferrites were investigated.The results show that the substitution of Dy^(3+)ions for Y^(3+)ions on 24c-site has no obvious effect on the microstructure,saturation magnetization,resistivity and dielectric loss.With increase of Dy^(3+)substitution,the spin wave linewidth increases from 8.9 Oe to 28.5 Oe.In order to reduce the loss of garnet ferrites,appropriate amounts of Ca^(2+)-Ge^(4+)ions are substituted for Y^(3+)ions on 24c-site and Fe^(3+)ions on 24d-site,respectively.The ferromagnetic resonance linewidth is reduced from 162 Oe to 102 Oe and the spin wave linewidth increases from 15.3 Oe to 22.5 Oe.In addition,the In^(3+)substitution has little effect on the dielectric loss of the garnet ferrites,maintaining excellent dielectric properties.

关 键 词：石榴石铁氧体 Dy^(3+)取代 Ca^(2+)-Ge^(4+)取代 铁磁共振线宽 自旋波线宽 

分 类 号：TM277.3[一般工业技术—材料科学与工程]