Large topological hall effect in a short-period helimagnet MnGe

N. Kanazawa, Y. Onose, T. Arima, D. Okuyama, Kenji Ohoyama, S. Wakimoto, K. Kakurai, S. Ishiwata, Y. Tokura

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252 Citations (Scopus)

Abstract

We have observed an unconventional, likely topological, Hall effect over a wide temperature region in the magnetization process of a chiral-lattice helimagnet MnGe. The magnitude of the topological Hall resistivity is nearly temperature-independent below 70 K, which reflects the real-space fictitious magnetic field proportional to a geometric quantity (scalar spin chirality) of the underlying spin texture. From the neutron diffraction study, it is anticipated that a relatively short-period (3-6 nm) noncoplanar spin structure is stabilized from the proper screw state in a magnetic field to produce the largest topological Hall response among the B20-type (FeSi-type) chiral magnets.

Original languageEnglish
Article number156603
JournalPhysical Review Letters
Volume106
Issue number15
DOIs
Publication statusPublished - 2011 Apr 15
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Kanazawa, N., Onose, Y., Arima, T., Okuyama, D., Ohoyama, K., Wakimoto, S., Kakurai, K., Ishiwata, S., & Tokura, Y. (2011). Large topological hall effect in a short-period helimagnet MnGe. Physical Review Letters, 106(15), [156603]. https://doi.org/10.1103/PhysRevLett.106.156603