Large topological Hall effect in a short-period helimagnet MnGe.

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

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

Afiliación

Kanazawa N; Department of Applied Physics and Quantum Phase Electronics Center (QPEC), University of Tokyo, Tokyo 113-8656, Japan.

Phys Rev Lett ; 106(15): 156603, 2011 Apr 15.

Article en En | MEDLINE | ID: mdl-21568591

RESUMEN

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.

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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2011 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos

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