Onset Magnetic Field for Rearrangement of Martensite Variants in Ni2MnGa

Abstract:

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The magnetic field strength, Hs, at which rearrangement of martensite variants initiates has been investigated in Ni2MnGa ferromagnetic shape memory alloy by magnetization measurements in the [001]P direction ("P" stands for the parent phase). We have also calculated Hs from the magnetocrystalline anisotropy constant Ku, spontaneous magnetization Ms, twinning shear s and twinning stress τreq by considering the condition for the rearrangement of martensite variants reported previously [Int. J. Appl. Electromagnetics and Mechanics, 23 (2006) 45]. The calculated value of Hs is in good agreement with the experimental value for all the examined temperatures. The agreement confirms the applicability of the reported condition.

Info:

Periodical:

Materials Science Forum (Volumes 561-565)

Main Theme:

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee

Pages:

1109-1112

DOI:

10.4028/www.scientific.net/MSF.561-565.1109

Citation:

T. Fukuda et al., "Onset Magnetic Field for Rearrangement of Martensite Variants in Ni2MnGa", Materials Science Forum, Vols. 561-565, pp. 1109-1112, 2007

Online since:

October 2007

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$35.00

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