铁磁晶体和亚铁磁晶体在外磁场中被磁化时，长度尺寸及体积大小均要发生微小的变化，而去掉外磁场后，又恢复原来长度或体积。这种现象称为磁致伸缩现象。
型号GY系列是“线性位移传感器”聘用磁致伸缩现象，特别是蝇效果。
Model GY Series are "Linear Displacement Transducers" employing magnetostrictive phenomena, especially the Wiedemann effect.
磁力共振是一种与磁性介质尺寸有关的共振现象，它是在磁化过程中伴之较大的磁致伸缩振动引起的力学共振。
Magnetomechanical resonance is a resonant phenomenon related to the size of magnetic medium and it is a mechanical resonance caused by magnetostriction vibration during magnetization.
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