基于微波铁磁共振的YIG铁氧体晶体材料探究实验  

Study on YIG ferrite crystal materials based on microwave ferromagnetic resonance

作　　者：杨东侠 刘安平[1] 韩忠[1] 何光宏[1] 席明[1] 张昊一[1] 倪曙煜 

机构地区：[1]重庆大学物理学院,重庆401331

出　　处：《物理实验》2016年第12期1-4,共4页Physics Experimentation

基　　金：重庆大学教改项目(No.2014Y30)

摘　　要：在超高频微波场中测量了YIG晶体的共振谱线,并计算多晶样品的g因子、旋磁比、共振线宽、弛豫时间以及单晶样品的g因子.实验结果表明:YIG样品的磁场强度H与励磁电压U成正比关系,励磁电流I与功率P之间成线性关系,并通过电压U与电流I的关系得到H与I的关系,即U∝H∽I∝P.The resonance spectra of YIG crystals were measurend in microwave magnetic field with ultra-high frequency, and some parameters were calculated, such as factor g of single crystal and polycrystal, gyromagnetic ratio, resonance line width, and relaxation time. The experimental results showed that a direct ratio relation laid between exciting voltage U and the magnetic field intensity H of YIG crystal. Meanwhile the exciting current I had a linear relation with power P, and the relation be- tween H and I could be deduced by the relation between U and I （U∝H∽I∝P）.

关 键 词：微波铁磁共振 电子自旋 YIG晶体 共振谱线 

分 类 号：TN61[电子电信—电路与系统]