La、Co掺杂调控Sr-M六角铁氧体磁性能及高频铁磁共振线宽  

La and Co Doping Regulating Magnetic Properties and High Frequency Ferromagnetic Resonance Linewidth of Sr-M Hexagonal Ferrite

作　　者：黄小忠 鲜聪 孔伟 王殿杰 张远[1] HUANG Xiaozhong;XIAN Cong;KONG Wei;WANG Dianjie;ZHANG Yuan(Southwest Institute of Applied Magnetics,Fourth Division,Mianyang 621000,China)

机构地区：[1]西南应用磁学研究所第四事业部,四川绵阳621000

出　　处：《材料科学与工程学报》2023年第5期730-735,798,共7页Journal of Materials Science and Engineering

基　　金：四川省科技计划资助项目(2021YFG0019)。

摘　　要：本研究基于磁场成型技术制备了高矫顽力、高剩磁比的Sr-M六角铁氧体;研究了La、Co掺杂对Sr-M六角铁氧体饱和磁化强度、剩磁比、矫顽力等的影响;采用共面波导系统通过扫频方式测试不同La、Co掺杂Sr-M六角铁氧体的高频铁磁共振线宽,研究了样品的共振频率、各向异性场和铁磁共振线宽。研究表明,样品具有明显的各向异性且大于19 KOe,2 T下易磁化轴剩磁比都在0.88以上,饱和磁化强度和矫顽力随掺杂量的增加而增大;铁磁共振测试显示样品的共振频率、各向异性场随La、Co掺杂量的增加先升高后减小;样品的共振频率在62~66 GHz之间,当测试频率大于60 GHz,扫频的数据才会出现明显的铁磁共振线宽吸收峰,且高频铁磁共振线宽在1000 Oe以上。Sr-M hexagonal ferrite with high coercivity and high remanence ratios was prepared based on magnetic field forming technology to investigate the impact of La and Co doping on the saturation magnetization,remanence ratio and coercivity of Sr-M hexagonal ferrite.A coplanar waveguide system was used to measure the high frequency ferromagnetic resonance linewidth of different La and Co doped Sr-M hexagonal ferrites by scanning frequency.The resonant frequency,anisotropy field and ferromagnetic resonance linewidth of the samples was researched.The sample has obvious anisotropy and is greater than 19 KOe,the remanence ratio of the easy magnetization axis at 2 T is higher than 0.88,and the saturation magnetization and coercivity increase with increasing doping.Ferromagnetic resonance tests show that the resonance frequency and anisotropy field of the sample increases and then decreases with the increase of La and Co doping.The resonance frequencies of all samples are between 62-66 GHz,when the test frequency is greater than 60 GHz.The swept-frequency data will have an obvious absorption peak of ferromagnetic resonance linewidth,and the high-frequency ferromagnetic resonance linewidth is above 1000 Oe.

关 键 词：Sr-M六角铁氧体 剩磁比 矫顽力 铁磁共振线宽 

分 类 号：TM277[一般工业技术—材料科学与工程]