Magnetic field-enhanced shape memory effect in Ni51.6Mn23.4Ga25 single crystals

Y. T. Cui*, Z. Y. Zhu, J. L. Chen, K. J. Liao, W. L. Wang, G. H. Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We have performed the various measurements of the transformation strain with and without the different external magnetic fields on the Ni 51.6Mn23.4Ga25 single crystals. A stress-free and two-way thermoelastic shape memory, with -1.15% strain (negative sign represents the shrinkage) and 6 K temperature hysteresis, has been found in the single crystal. The deformation can be enhanced up to -2.35% with a bias field 1.2 T applied along the measurement direction of the parent phase [001] crystallographic axial direction. Turning the field laterally applied to [010] and [100] directions of the parent phase, however, the strain was suppressed by the field of 1.2 T to 0.56% and -0.55%, respectively, a different deformation scene. Moreover, it is found that even the field of 1.2 T does not have a significant influence on the phase transition temperature and the temperature hysteresis, which indicates that the mechanism of field-enhanced strain in this material is the twin boundary motion.

Original languageEnglish (US)
Pages (from-to)2005-2008
Number of pages4
JournalMaterials Science Forum
Volume475-479
Issue numberIII
StatePublished - 2005
Externally publishedYes

Keywords

  • Martensitic transformation
  • Shape memory effect
  • Transformation strain

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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