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J. Appl. Phys. 111, 07A904 (2012); http://dx.doi.org/10.1063/1.3670052 (3 pages)

Phase instability of magnetic ground state in antiperovskite Mn3ZnN: Giant magnetovolume effects related to magnetic structure

T. Hamada and K. Takenaka

Department of Crystalline Materials Science, Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan

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(Received 20 September 2011; accepted 3 October 2011; published online 6 February 2012)

We verified the intimate relation between magnetism and volume in Mn3ZnN. The sample sintered at 900 °C is characterized by the Γ5g triangular antiferromagnetic (AF) state with larger volume below 170 K. However, for the sample sintered at 700 °C, the re-entrant phase transition appears at 80 K and the ground state is a different AF state with smaller volume. These results indicate that the ground state of Mn3ZnN is sensitive to the disorder in the N site and that the magnetic structure drastically alters magnetovolume effects. More detailed consideration is necessary beyond the conventional scheme, which incorporates only the amplitude of the magnetic moment.

© 2012 American Institute of Physics

KEYWORDS, PACS, and IPC

PACS

  • 75.80.+q

    Magnetomechanical effects, magnetostriction

  • 75.25.-j

    Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.)

  • 75.30.Kz

    Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)

  • 75.50.Ee

    Antiferromagnetics

  • 75.30.Cr

    Saturation moments and magnetic susceptibilities

  • 81.20.Ev

    Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation

International Patent Classification (IPC)

  • H01F1/00

    Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties

ARTICLE DATA

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

For access to fully linked references, you need to log in.
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