The thermal expansion coefficient and volume magnetostriction of Heusler Ni2MnGa alloys

V. D. Buchelnikov, V. V. Khovailo, T. Takagi

Research output: Contribution to journalConference articlepeer-review

28 Citations (Scopus)

Abstract

In this work the thermal expansion coefficient of Ni2MnGa alloy was experimentally determined. It was shown that the thermal expansion coefficient has a peak at the point of magnetic phase transition. The value of thermal expansion coefficient jump at Curie point is Δκ=1. 8×10-5 K-1. From the phenomenological Ginzburg-Landau theory of a magnetic second-order phase transition the expression for a jump of thermal expansion coefficient in Curie point was obtained. From the comparison of experimental and theoretical jumps of thermal expansion the value of volume magnetostriction for Ni2MnGa alloy was determined: B1≈20×109 erg/cm3.

Original languageEnglish
Pages (from-to)e459-e461
JournalJournal of Magnetism and Magnetic Materials
Volume300
Issue number1
DOIs
Publication statusPublished - 2006 May
EventThird International Symposium on Magnetism 2005 -
Duration: 2005 Jun 262005 Jun 30

Keywords

  • Ferromagnetic materials
  • Magnetostriction
  • Phase transitions - magnetic
  • Phase transitions - structural

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint

Dive into the research topics of 'The thermal expansion coefficient and volume magnetostriction of Heusler Ni<sub>2</sub>MnGa alloys'. Together they form a unique fingerprint.

Cite this