双层铁磁薄膜中层间耦合和面外各向异性对系统共振频率的影响  

Effect of Interlayer Coupling and out of Plane Anisotropy on Resonance Frequencies in Ferromagnetic Bilayer Films

作　　者：王焕[1] 包锦[1] WANG Huan;BAO Jin(College of Science,Inner Mongolia Agricultural University,Hohhot O10018,China)

机构地区：[1]内蒙古农业大学理学院,呼和浩特010018

出　　处：《内蒙古大学学报（自然科学版）》2024年第2期154-159,共6页Journal of Inner Mongolia University：Natural Science Edition

基　　金：内蒙古自治区高等学校科学研究项目(NJZY21454);内蒙古自治区高等学校科学研究重点项目(NJZZ23036)。

摘　　要：本文采用能量极小原理,重点讨论了层间双线性耦合、双二次型耦合和面外单轴各向异性对双层铁磁薄膜中铁磁共振频率的影响。分别从三个方面讨论光学模和声学模共振频率对层间双线性耦合、双二次型耦合以及面外单轴各向异性的依赖。结果表明,层间双线性耦合和双二次型耦合可以提高光学模的共振频率。然而,面外单轴各向异性会降低光学模和声学模的共振频率,尤其是对声学模的影响更加明显。此外,对于光学模,双二次型耦合比双线性耦合更为重要。这些结果有助于新型微波器件的设计。The effect of bilinear coupling,biquadratic coupling and out of plane uniaxial anisotropy on ferromagnetic resonance frequency in ferromagnetic bilayer films with fixed in-plane uniaxial anisotropy is investigated using the principle of minimal energy.The bilinear coupling,biquadratic coupling and out of plane uniaxial anisotropy dependence of resonance frequencies of optical modes and acoustic modes are discussed from three aspects.It is shown that resonance frequency can be enhanced by considering of bilinear coupling and biquadratic coupling.However,the resonance frequency of an optical mode and an acoustic mode can be reduced by out of plane uniaxial anisotropy,especially for an acoustic mode.Moreover,the biquadratic coupling is more important than the bilinear coupling for an optical mode.These results may be useful in designing new microwave devices.

关 键 词：双线性耦合 双二次型耦合 面外单轴各向异性 铁磁共振 

分 类 号：O484.4[理学—固体物理]