Pulsed magnetic field-induced actuation of Ni-Mn-Ga single crystals

被引：135
作者：
Marioni, MA [1 ]
O'Handley, RC [1 ]
Allen, SM [1 ]
机构：
[1] MIT, Cambridge, MA 02139 USA
来源：
APPLIED PHYSICS LETTERS | 2003年 / 83卷 / 19期
关键词：
D O I：
10.1063/1.1626021
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The field-induced actuation of Ni-Mn-Ga single crystals through twin-boundary motion has been demonstrated with magnetic fieldpulses of various intensities lasting 620 mus. It is shown that the complete field-induced strain can be obtained in 250 mus, which implies the possibility of full 6% cycling of Ni-Mn-Ga at 2 kHz, for crystals having dimensions in the range of a few millimeters. The final extension increases with the peak driving force, which is not linear with the field and saturates at 7.85 kOe. An increase of the field beyond the saturation level produces no additional strain but reduces the time for field-induced detwinning. (C) 2003 American Institute of Physics.
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页码：3966 / 3968
页数：3
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