名词
中文翻译：自发磁致伸缩
同义词：
['spontaneous strain', 'spontaneous contraction']
例句：
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1. The material undergoes spontaneous magnetostriction when subjected to an external magnetic field.
当材料受到外部磁场作用时，会发生自发磁致伸缩现象。
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2. This phenomenon is responsible for the mechanical properties of ferromagnetic materials.
这种现象是铁磁性材料机械性能的原因。
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3.In the case of a permanent magnet, the magnetostriction can be controlled by adjusting the magnetic field strength.
对于永久磁铁，可以通过调整磁场强度来控制磁致伸缩。