Magnetic phase diagram of Ni2Mn1.44-xCu xSn0.56 shape memory alloys

T. Kanomata, R. Y. Umetsu, K. Ohtsuki, T. Shoji, K. Endo, K. Fukushima, H. Nishihara, W. Ito, Y. Adachi, T. Miura, K. Oikawa, R. Kainuma, K. R.A. Ziebeck

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2 Citations (Scopus)

Abstract

Magnetization measurements have been carried out on the magnetic shape memory alloys (MSMAs) Ni2Mn1.44-xCuxSn 0.56 (0 ≤ x ≤ 0.09). On the basis of the experimental results, the phase diagram of Ni2Mn1.44-xCuxSn 0.56 (0 ≤ x ≤ 0.09) alloys in the temperature-concentration plane has been determined. The resultant phase diagram is spanned by paramagnetic austenite (Para-A), ferromagnetic austenite (Ferro-A) and ferromagnetic martensite (Ferro-M) phases. The martensitic transition temperature TM makes a broad maximum as a function of x, whereas, in the austenite phase the Curie temperature TC decreases slightly with x. The TC of Ni2Mn1.415Cu 0.025Sn0.56 was found to decrease linearly with pressure, whereas TM increased linearly with pressure. The values of dT M/dp and dTC/dp of Ni2Mn1.415Cu 0.025Sn0.56 were found to be 0.88 K/kbar and -0.31 K/kbar, respectively.

Original languageEnglish
Pages (from-to)221-226
Number of pages6
JournalJournal of Alloys and Compounds
Volume590
DOIs
Publication statusPublished - 2014 Mar 25

Keywords

  • Curie temperature
  • Martensitic transition temperature
  • Phase diagram
  • Pressure effect
  • Shape memory alloy

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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    Kanomata, T., Umetsu, R. Y., Ohtsuki, K., Shoji, T., Endo, K., Fukushima, K., Nishihara, H., Ito, W., Adachi, Y., Miura, T., Oikawa, K., Kainuma, R., & Ziebeck, K. R. A. (2014). Magnetic phase diagram of Ni2Mn1.44-xCu xSn0.56 shape memory alloys. Journal of Alloys and Compounds, 590, 221-226. https://doi.org/10.1016/j.jallcom.2013.12.045