光子晶体
物理
光学
非线性系统
光子学
材料科学
非线性光学
光电子学
作者
Peigen Ni,Boqin Ma,Yuanhao Liu,Bingying Cheng,Daozhong Zhang
摘要
The temperature dependence of the magnetic field-induced strain (MFIS) and the field-controlled shape memory effect in Ni52Mn16.4Fe8Ga23.6 single crystals were investigated by measuring the MFIS and measuring the magnetic field-enhanced transformation strain with a field bias applied in the [001] and [010] directions of the parent phase, respectively. The results show that such material combined with the martensitic transformation can product large field-enhanced transformation strain and large MFIS. The strain accompanying the martensitic transformation is -1.61% in zero field and can be enhanced to -3.30% by a field of 960 kA/m. A MFIS of 1.04% has been induced along [001] in unstressed crystals with saturated magnetic field of 600 Win applied along the same direction at near martensitic transformation temperature. It was found that the MFIS is almost temperature independent; the maximum decrease of the saturated MFIS is less than 10%, from 265 K to 100 K. This well-behaved temperature response makes this alloy particularly valuable for industrial and military smart actuators and transducers. Furthermore, it was found that the direction in which the MFIS has the largest value is always the [001], namely, the growth direction of the crystals.
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