Optical imaging and magnetocaloric effect measurements in pulsed high magnetic fields and their application to Ni-Co-Mn-In Heusler alloy

T. Kihara, I. Katakura, M. Tokunaga, A. Matsuo, K. Kawaguchi, A. Kondo, K. Kindo, W. Ito, X. Xu, R. Kainuma

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

As novel tools to study magnetic shape memory alloys, a high-speed optical microscope system and a measurement system of magnetocaloric effects (MCEs) in pulsed magnetic fields are developed. Using the high-speed imaging system, successive changes in the surface morphology are visualized in the process of magnetic field-induced reverse martensitic transformation in Ni 45Co5Mn36.7In13.3. The MCEs of Gd studied in pulsed fields show reasonable agreement with the earlier results obtained in steady fields. Application of high magnetic fields up to 55 T realizes a gigantic adiabatic heating of 63 K.

Original languageEnglish
Pages (from-to)S722-S725
JournalJournal of Alloys and Compounds
Volume577
Issue numberSUPPL. 1
DOIs
Publication statusPublished - 2013 Nov 15

Keywords

  • High magnetic fields
  • Magnetocaloric effect
  • Microscopy
  • Shape memory alloys

ASJC Scopus subject areas

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

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