Open Access
Issue
ESOMAT 2009
2009
Article Number 04008
Number of page(s) 7
Section Principles, Simulations, Materials: Advanced Materials
DOI https://doi.org/10.1051/esomat/200904008
Published online 01 September 2009
ESOMAT 2009, 04008 (2009)
DOI: 10.1051/esomat/200904008

Rearrangement of crystallographic domains driven by magnetic field in Fe3Pt and CoO and new phase appearance in Ni2MnGa

T. Kakeshita, T. Terai, M. Yamamoto and T. Fukuda

Department of Materials Science and Engineering, Graduate School of Engineering, Osaka University, 2-1 Yamada-Oka, Suita, Osaka 565-0871, Japan

kakesita@mat.eng.osaka-u.ac.jp

Published online: 1 September 2009

Abstract
We have investigated the rearrangement of crystallographic domains driven by magnetic field in a ferromagnetic shape memory alloy of Fe3Pt and an antiferromagnetic oxide of CoO. Also, we have determined the equilibrium stress-temperature phase diagram in a ferromagnetic shape memory alloy of Ni2MnGa. Following results are obtained ; (i) We confirm that magnetic field promotes the rearrangement of crystallographic domains in Fe3Pt and CoO and the condition of the rearrangement in the present two systems is the same, that is, the magnetic shear stress, which corresponds to the magnetic anisotropy energy divided by the twinning shear, is equal to or larger than the twinning stress. (ii) We construct the equilibrium stress-temperature phase diagram of Ni2MnGa by compressive tests and magnetic susceptibility measurements, and show the existence of the new phase of X-phase. Moreover, we evaluate the triple point at which the I-, P- and X-phases coexist and suggest the existence of a critical point of the successive P → X → I transformation.

Note to the reader:
On pages 04008-p1, 04008-p2, 04008-p3 and 04008-p6 several mistakes have been corrected on October 19, 2009.



© Owned by the authors, published by EDP Sciences 2009

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.