一种磁化动力学参数和磁弹耦合系数测试方法及系统
By combining surface acoustic wave theory and magnetization dynamics theory, and utilizing the magneto-acoustic coupling effect, the problems of complexity and insufficient accuracy in testing micron-scale magnetostrictive films in traditional methods are solved, and efficient and low-cost testing of magnetization dynamics parameters and magnetoelastic coupling coefficients is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- UNIV OF ELECTRONICS SCI & TECH OF CHINA
- Filing Date
- 2026-05-11
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional methods are difficult to effectively test the magnetization dynamics parameters and magnetoelastic coupling coefficient of micron-scale magnetostrictive films. They are complex to operate, lack sufficient accuracy, and require complex equipment or introduce external environmental interference.
Based on surface acoustic wave theory and magnetization dynamics theory, the intrinsic parameters of magnetostrictive films are converted into surface acoustic wave velocity information by utilizing the magneto-acoustic coupling effect. By acquiring the phase of the electrical signal of surface acoustic waves, and combining data processing, the uniaxial anisotropic field, magnetoelastic coupling coefficient and effective damping factor of the magnetostrictive film are extracted in one go. The test is carried out using a surface acoustic wave delay line platform.
This method enables simple and accurate testing of the magnetization dynamics parameters and magnetoelastic coupling coefficient of magnetostrictive thin films, avoiding external environmental interference, improving the test signal-to-noise ratio, and reducing costs.
Smart Images
Figure CN122172085B_ABST