硅的加入有利于传质和限制晶界移动；
Silicon is favorable to mass transfer and the limitation of movement of grain boundary.
单晶材料消除了晶界对畴壁移动的影响，具有很好的低场下的位移输出能力，这为微位移致动器的研制奠定了很好的基础。
These excellent single crystals, possessing a large displacement output under low magnetic field, build a foundation for the fabrication of the high precision micro-displacement actuators.
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