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退磁对称应力试验加将一突变应力叠加于稳态应力之上，则实质上可消除上述应力滞后效应．前者在若干循环中递减下降．这一技术使得应力敏感因子（定义为8Cm电压与外加应力之比，单位是mVMPa－1）能在低外加应力上测量．图7示出典型结果。如在样品上加一个50Hz磁场（当稳态应力?
Demagnetization symmetrical stress test plus a sudden stress superimposed on the steady-state stress, then virtually eliminate the stress lag effect. The former decreases declining over several cycles. This technique allows the stress-sensitive factor (defined as the ratio of 8Cm voltage to applied stress in mVMPa-1) to be measured at low applied stress. Figure 7 shows a typical result. If the sample plus a 50Hz magnetic field (when the steady-state stress?