TITLE

Magnetization dependence on dynamic strain in ferromagnetic shape memory Ni–Mn–Ga

AUTHOR(S)
Sarawate, N. N.; Dapino, M. J.
PUB. DATE
August 2008
SOURCE
Applied Physics Letters;8/11/2008, Vol. 93 Issue 6, p062501
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The characterization of commercial Ni–Mn–Ga for use as a dynamic deformation sensor is addressed. The flux density is experimentally determined as a function of cyclic strain loading at frequencies from 0.2 to 160 Hz. With increasing frequency, the stress versus strain response remains almost unchanged whereas the flux density versus strain response shows increasing hysteresis. This behavior indicates that twin-variant reorientation occurs in concert with the mechanical loading, whereas the rotation of magnetization vectors occurs with a delay as the loading frequency increases. The increasing magnetization hysteresis must be considered when utilizing the material in dynamic sensing applications.
ACCESSION #
34000065

 

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