Novel magnetic chiral structures and unusual temperature hysteresis in the metallic helimagnet MnP

Teruo Yamazaki, Yoshikazu Tabata, Takeshi Waki, Taku J. Sato, Masato Matsuura, Kenji Ohoyama, Makoto Yokoyama, Hiroyuki Nakamura

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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 (T < 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 c-axis, 47 < T < 252 K, we have found a weak ferromagnetic behavior along the b-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 292K via the HT ferromagnetic phase and LM state emerges with warming from the LT helimagnetic phase. The weak ferromagnetism along the b-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.

Original languageEnglish
Article number054711
JournalJournal of the Physical Society of Japan
Volume83
Issue number5
DOIs
Publication statusPublished - 2014 May 15
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Yamazaki, T., Tabata, Y., Waki, T., Sato, T. J., Matsuura, M., Ohoyama, K., Yokoyama, M., & Nakamura, H. (2014). Novel magnetic chiral structures and unusual temperature hysteresis in the metallic helimagnet MnP. Journal of the Physical Society of Japan, 83(5), [054711]. https://doi.org/10.7566/JPSJ.83.054711