Paper Title:
Effect of Magnetic Field on Martensite to Intermediate Phase Transformation in Ni2MnGa
  Abstract

We have investigated the martensitic transformation behavior in a single crystal of Ni2MnGa under various magnetic field. The single crystal used in the present study exhibits an intermediate phase (I-phase) transformation at TI = 250 K and a martensitic transformation at TM = 202 K. Since the martensite phase (M-phase) of Ni2MnGa has a large magnetocrystalline anisotropy, the effect of magnetic field depends significantly on the direction of magnetic field. We have measured the reverse (i.e., M-phase to I-phase) transformation start temperature As from a single variant state to examine the effect of magnetic field because the forward (I-phase to M-phase) transformation usually forms a multivariant state of the M-phase. When the magnetic field is applied parallel to the easy axis, As increases linearly with increasing magnetic field. On the other hand, when the magnetic field direction is not parallel to the easy axis, As decreases in a low field region and then increases on further increasing the magnetic field. Such behavior of magnetic field dependencies of As are quantitatively explained by the Clausius-Clapeyron equation, where we have assumed that the magnetic field dependence of As agrees with the magnetic field dependence of the equilibrium temperature.

  Info
Periodical
Edited by
Lluis Mañosa, P.K. Mukhopadhyay and S.R. Barman
Pages
199-203
DOI
10.4028/www.scientific.net/AMR.52.199
Citation
T. Fukuda, T. Kakeshita, "Effect of Magnetic Field on Martensite to Intermediate Phase Transformation in Ni2MnGa", Advanced Materials Research, Vol. 52, pp. 199-203, 2008
Online since
June 2008
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Zhen Rong Li, Jun Jie Qian, Guo Qiang Zhang, Zeng Zhe Xi, Zhuo Xu, Xi Yao
Abstract:The dielectric response of [110]-oriented 0.68PMN-0.32PT single crystal under dc electric field has been investigated. The characteristics...
42
Authors: Jie Dong, Z.F. Li, Xiao Qin Zeng, Wen Jiang Ding
Abstract:Intermediate phase growth in Mg-Al diffusion couples were studied with different intensity of a strong static magnetic field from 0 to 10...
491
Authors: Sadahiro Tsurekawa, H. Fujii, V.A. Yardley, T. Matsuzaki, T. Watanabe
Abstract:Crystallization kinetics and texture evolution in iron-based amorphous alloys (Fe78Si9B13, Fe73.5Si13.5B9Nb3Cu1) under a magnetic field have...
1371
Authors: Subham Chatterjee, S. Giri, S.K. De, S. Majumdar
Abstract:Ferromagnetic shape memory alloy of nominal composition Ni50Mn35Sn15 has been investigated by magnetic and transport measurements. Clear...
215
Authors: Carlos Morón, Alfonso Garcia, Enrique Tremps, Jose Andrés Somolinos
Abstract:Related with the detection of weak magnetic fields, the anisotropic magnetoresistive (AMR) effect is widely utilized in sensor applications....
167