Intermartensitic transformation and magnetic-field-induced strain in Ni[sub 52]Mn[sub 24.5]Ga[sub 23.5] single crystals

Wang, W. H.; Wu, G. H.; Chen, J. L.; Gao, S. X.; Zhan, W. S.; Wen, G. H.; Zhang, X. X.
August 2001
Applied Physics Letters;8/20/2001, Vol. 79 Issue 8, p1148
Academic Journal
We have found a complete thermoelastic intermartensitic transformation between modulated and unmodulated martensite in single-crystal Ni[sub 52]Mn[sub 24.5]Ga[sub 23.5]. This intermartensitic transformation provides a much larger strain than that of the martensitic transformation. A giant switching-like strain of ±5.0% can be achieved by a small magnetic field of 0.2 T upon the intermartensitic transformation. In the modulated martensite, a large recoverable magnetic-field-induced strain of up to 1.2% has been obtained. © 2001 American Institute of Physics.


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