首页|Spin wave resonance frequency in bilayer ferromagnetic films with the biquadratic exchange interaction

Spin wave resonance frequency in bilayer ferromagnetic films with the biquadratic exchange interaction

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The dependences of spin wave resonance(SWR)frequency on the surface anisotropy field,interface exchange cou-pling,symmetry,biquadratic exchange(BQE)interaction,film thickness,and the external magnetic field in bilayer ferro-magnetic films are theoretically analyzed by employing the linear spin wave approximation and Green's function method.A remarkable increase of SWR frequency,except for energetically lower two modes,can be obtained in our model that takes the BQE interaction into account.Again,the effect of the external magnetic field on SWR frequency can be increased by increasing the biquadratic to interlayer exchange ratio.It has been identified that the BQE interaction is of utmost impor-tance in improving the SWR frequency of the bilayer ferromagnetic films.In addition,for bilayer ferromagnetic films,the frequency gap between the energetically highest mode and lowest mode is found to increase by increasing the biquadratic to interlayer exchange ratio and film thickness and destroying the symmetry of the system.These results can be used to improve the understanding of magnetic properties in bilayer ferromagnetic films and thus may have prominent implications for future magnetic devices.

spin wave resonance frequencybiquadratic exchange interactioninterface exchange couplingsurface anisotropy

张晓洁、王雨汀、常艳秋、王焕、荣建红、云国宏

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Inner Mongolia Key Laboratory of Nanoscience and Nanotechnology and School of Physical Science and Technology,Inner Mongolia University,Hohhot 010021,China

College of Science,Inner Mongolia Agricultural University,Hohhot 010018,China

College of Physics and Electronic Information,Inner Mongolia Normal University,Hohhot 010022,China

Natural Science Foundation of Inner Mongolia of ChinaResearch Program of Science and Technology at Universities of Inner Mongolia Autonomous Region,ChinaTheoretical Physics Discipline Development and Communication Platform of Inner Mongolia University

2019MS01021NJZY2145412147216

2024

10.1088/1674-1056/ad50bc

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(9)