Magnetic-field-induced strain of shape-memory alloy Fe3Pt studied by a capacitance method in a pulsed magnetic field

Takuo Sakon, Atsuo Takaha, Kenji Obara, Koutatsu Dejima, Hiroyuki Nojiri, Mitsuhiro Motokawa, Takashi Fukuda, Tomoyuki Kakeshita

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The precise magnetic-field-induced strain (MFIS) and magnetization of the martensite metallic compound Fe3Pt in a martensitic phase were studied in a pulsed magnetic field using the capacitance method at low temperatures down to 4.2 K, which is much lower than the martensitic transformation temperature TM = 85 K. After zero field cooling, a pulsed magnetic field with a maximum frequency of 160Hz was applied parallel to the [001]p axis. A large MFIS was measured. The value of the MFIS is ΔL/L = -1.7%. When the magnetic field was decreased, the recovery of the strain was observed. In the second applied field, a strain of about 0.6% was observed. This means that MFIS occurs even in short-pulse magnetic fields. MFIS was observed below 70 K. The largest strain was observed at 20 K. These results are almost the same as the MFIS in a steady magnetic field using a superconducting magnet.

Original languageEnglish
Pages (from-to)146-151
Number of pages6
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume46
Issue number1
DOIs
Publication statusPublished - 2007 Jan 10

Keywords

  • Capacitance method
  • Magnetic-field-induced strain
  • Magnetization
  • Pulsed magnetic field
  • Shape memory alloy

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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