M-H回线可变时间常数的测量方法

A Method of Measuring M-H Hysteresis Loop Curves Based on Shift-variant Low Pass Filter

针对光调制直接重写磁光薄膜磁滞回线的测量 ,提出一种简单的自动变积分时间常数的测量方法 ,既能有效地抑制噪声 ,确保幅度和相位的不失真 ,又能保证 M- H矩形度的不失真 ,以及矫顽力 Hc的一定精度。并给出一个比较例子 ,结果表明该方法更合理。

A method of measuring M-H hysteresis loop based on shift-variant low pass filter is presented in this paper. It ensures not only that the amplitude and phase of magnetization and form of M-H hysteresis loop curve are not distortion, but also that the determination of coercivity is in certain accuracy. A given example of application shows that the method is reasonable.