Dielectric and magnetic anomalies and spin frustration in hexagonal (formula presented) (formula presented) Yb, and Lu)

N. Yamamoto; H. Takagi; Takuro Katsufuji; M. Masaki; S. Mori; Y. Moritomo

doi:10.1103/PhysRevB.64.104419

Dielectric and magnetic anomalies and spin frustration in hexagonal (formula presented) (formula presented) Yb, and Lu)

N. Yamamoto, H. Takagi, Takuro Katsufuji, M. Masaki, S. Mori, Y. Moritomo

Research output: Contribution to journal › Article

Abstract

Single crystals of hexagonal (formula presented) (formula presented) Yb, and Lu), where Mn ions form the triangular lattice, were investigated, focusing on their dielectric/magnetic anomalies as well as geometrical spin frustration. It is found that the ratio of a Weiss temperature to (formula presented) is (formula presented) in (formula presented) indicating the dominant role of strong geometrical frustration. The effect of geometrical frustration also appears in specific heat, which shows a presence of a substantial amount of residual magnetic contribution below (formula presented) indicating that a part of the spins are still fluctuating at (formula presented) It is also found that the dielectric anomaly at (formula presented) is strongly anisotropic, suggesting a unique correlation between magnetism and dielectric properties in these compounds.

Original language	English
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	64
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevB.64.104419
Publication status	Published - 2001 Jan 1
Externally published	Yes

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ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Cite this

Yamamoto, N., Takagi, H., Katsufuji, T., Masaki, M., Mori, S., & Moritomo, Y. (2001). Dielectric and magnetic anomalies and spin frustration in hexagonal (formula presented) (formula presented) Yb, and Lu). Physical Review B - Condensed Matter and Materials Physics, 64(10). https://doi.org/10.1103/PhysRevB.64.104419

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AU - Yamamoto, N.

AU - Takagi, H.

AU - Katsufuji, Takuro

AU - Masaki, M.

AU - Mori, S.

AU - Moritomo, Y.

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AB - Single crystals of hexagonal (formula presented) (formula presented) Yb, and Lu), where Mn ions form the triangular lattice, were investigated, focusing on their dielectric/magnetic anomalies as well as geometrical spin frustration. It is found that the ratio of a Weiss temperature to (formula presented) is (formula presented) in (formula presented) indicating the dominant role of strong geometrical frustration. The effect of geometrical frustration also appears in specific heat, which shows a presence of a substantial amount of residual magnetic contribution below (formula presented) indicating that a part of the spins are still fluctuating at (formula presented) It is also found that the dielectric anomaly at (formula presented) is strongly anisotropic, suggesting a unique correlation between magnetism and dielectric properties in these compounds.

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10.1103/PhysRevB.64.104419