Paper Title:

NiMn-Based Metamagnetic Shape Memory Alloys

Periodical Materials Science Forum (Volume 635)
Main Theme Ferromagnetic Shape Memory Alloys II
Edited by V. A. Chernenko and J. M. Barandiaran
Pages 23-31
DOI 10.4028/www.scientific.net/MSF.635.23
Citation Ryosuke Kainuma et al., 2009, Materials Science Forum, 635, 23
Online since December, 2009
Authors Ryosuke Kainuma, K. Ito, W. Ito, R.Y. Umetsu, T. Kanomata, Kiyohito Ishida
Keywords Metamagnetic Shape Memory, NiMnIn, NiMnSn, Powder Metallurgy (PM)
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Abstract

The magnetic properties of the parent and martensite phases of the Ni2Mn1+xSn1-x and Ni2Mn1+xIn1-x ternary alloys and the magnetic field-induced shape memory effect obtained in NiCoMnIn alloys are reviewed, and our recent work on powder metallurgy performed for NiCoMnSn alloys is also introduced. The concentration dependence of the total magnetic moment for the parent phase in the NiMnSn alloys is very different from that in the NiMnIn alloys, and the magnetic properties of the martensite phase with low magnetization in both NiMnSn and NiMnIn alloys has been confirmed by Mössbauer examination as being paramagnetic, but not antiferromagnetic. The ductility of NiCoMnSn alloys is drastically improved by powder metallurgy using the spark plasma sintering technique, and a certain degree of metamagnetic shape memory effect has been confirmed.