Novel Magnetic Chiral Structures and Unusual Temperature Hysteresis in the Metallic Helimagnet MnP

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Author(s)

    • Yamazaki Teruo Yamazaki Teruo
    • <label><sup>1</sup></label>Neutron Science Laboratory, Institute for Solid State Physics, University of Tokyo, Tokai, Ibaraki 319-1106, Japan
    • Sato Taku J.
    • <label><sup>1</sup></label>Neutron Science Laboratory, Institute for Solid State Physics, University of Tokyo, Tokai, Ibaraki 319-1106, Japan
    • Matsuura Masato
    • <label><sup>3</sup></label>Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
    • Ohoyama Kenji
    • <label><sup>3</sup></label>Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
    • Yokoyama Makoto
    • <label><sup>4</sup></label>Faculty of Science, Ibaraki University, Mito 310-8512, Japan
    • Nakamura Hiroyuki
    • <label><sup>2</sup></label>Department of Materials Science and Engineering, Kyoto University, Kyoto 606-8501, Japan

Abstract

We have reinvestigated the magnetic properties of the classical metallic helimagnet MnP by magnetization and neutron scattering experiments. Our neutron scattering results indicate that the previously reported magnetic structure in the low-temperature (LT) helimagnetic phase (<italic>T</italic>< 47 K) should be modified to an alternately tilted helimagnetic structure produced by the Dzyaloshinsky–Moriya interaction. In the intermediate temperature (IT) range between the LT helimagnetic phase and the high-temperature (HT) ferromagnetic phase along the <italic>c</italic>-axis, 47 < <italic>T</italic>< 252 K, we have found a weak ferromagnetic behavior along the <italic>b</italic>-axis. Surprisingly, the IT weak ferromagnetic phase has two different states, namely, the large magnetization (LM) and small magnetization (SM) states. The SM state emerges with cooling from the paramagnetic phase above 292 K via the HT ferromagnetic phase and LM state emerges with warming from the LT helimagnetic phase. The weak ferromagnetism along the <italic>b</italic>-axis and the unusual temperature hysteresis in the IT phase can be understood by assuming a spontaneous formation of the stripe structure consisting of alternately arranged HT ferromagnetic and LT helimagnetic domains.

Journal

  • Journal of the Physical Society of Japan

    Journal of the Physical Society of Japan 83(5), 054711-1-8, 2014-04-15

    The Physical Society of Japan

Codes

  • NII Article ID (NAID)
    40020060330
  • NII NACSIS-CAT ID (NCID)
    AA00704814
  • Text Lang
    ENG
  • Article Type
    FULL PAPERS
  • ISSN
    0031-9015
  • NDL Article ID
    025448491
  • NDL Call No.
    Z53-A404
  • Data Source
    NDL  JPS 
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