兆赫兹旋转传感器输出电压和磁化行为对阻尼常数、频率和线长的依赖性的微磁研究。
Micromagnetic Study of the Dependence of Output Voltages and Magnetization Behaviors on Damping Constant, Frequency, and Wire Length for a Gigahertz Spin Rotation Sensor.
机构信息
Department of Applied Physics, School of Advanced Engineering, Kogakuin University, Tokyo 163-8677, Japan.
Graduate School of Electrical Engineering and Electronic, Kogakuin University, Tokyo 163-8677, Japan.
出版信息
Sensors (Basel). 2023 Mar 3;23(5):2786. doi: 10.3390/s23052786.
In this report, we studied the dependence of output voltage on the damping constant, the frequency of the pulse current, and the wire length of zero-magnetostriction CoFeBSi wires using multiphysics simulation considering eddy currents in micromagnetic simulations. The magnetization reversal mechanism in the wires was also investigated. As a result, we found that a high output voltage can be achieved with a damping constant of ≥0.03. We also found that the output voltage increases up to a pulse current of 3 GHz. The longer the wire length, the lower the external magnetic field at which the output voltage peaks. This is because the demagnetization field from the axial ends of the wire is weaker as the wire length is longer.
在本报告中，我们通过考虑微磁模拟中的涡流的多物理场仿真，研究了零磁致伸缩 CoFeBSi 线的输出电压对阻尼常数、脉冲电流频率和线长的依赖性，并研究了线中磁化反转机制。结果表明，阻尼常数≥0.03 可获得高输出电压。我们还发现，输出电压随着脉冲电流增加到 3GHz 而增加。线越长，输出电压峰值的外部磁场越低。这是因为随着线长的增加，来自线轴向端的退磁场较弱。
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