Structural and Magnetic Properties of Magnetic Shape Memory Alloy Ni<sub>46</sub>Mn<sub>41</sub>In<sub>13</sub> under Magnetic Fields

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  • Abematsu Kenichi
    Graduate School of Science and Engineering, Kagoshima University
  • Umetsu Rie Y.
    Institute for Materials Research, Tohoku University
  • Kainuma Ryosuke
    Graduate School of Engineering, Tohoku University
  • Kanomata Takeshi
    Graduate School of Engineering, Tohoku University Research Institute for Engineering and Technology, Tohoku Gakuin University
  • Watanabe Kazuo
    Institute for Materials Research, Tohoku University
  • Koyama Keiichi
    Graduate School of Science and Engineering, Kagoshima University

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  • Structural and Magnetic Properties of Magnetic Shape Memory Alloy Ni₄₆Mn₄₁In₁₃ under Magnetic Fields

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The structural and magnetic properties of Heusler alloy Ni46Mn41In13 were studied by magnetization and X-ray powder diffraction measurements in the 4.5–350 K temperature range and in magnetic fields up to 5 T. The alloy undergoes martensitic transformation from a L21-type cubic structure with ac = 0.600 nm at 293 K to a six-layered monoclinic (6M) structure in the transition temperature of 160–230 K. The lattice parameters for the 6M structure were estimated to be am = 0.441 nm, bm = 0.557 nm, cm = 1.30 nm, αm = 90.0°, βm = 94.0°, and γm = 90.0° at 75 K. In this transformation from the L21 to 6M structures, the cell volume contracts by 0.34% at 8 K. In addition, we observed the magnetic field-induced reverse transformation of this alloy.

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 55 (3), 477-481, 2014

    The Japan Institute of Metals and Materials

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