1/3 Magnetization Plateau in Spin-1/2 Square Lattice Antiferromagnet (CuBr)Sr2Nb3O10

Yoshihiro Tsujimoto; Yoichi Baba; Noriaki Oba; Hiroshi Kageyama; Tomoya Fukui; Yasuo Narumi; Koichi Kindo; Takashi Saito; Mikio Takano; Yoshitami Ajiro; Kazuyoshi Yoshimura

doi:10.1143/jpsj.76.063711

1/3 Magnetization Plateau in Spin-1/2 Square Lattice Antiferromagnet (CuBr)Sr₂Nb₃O₁₀

Yoshihiro Tsujimoto, Yoichi Baba, Noriaki Oba, Hiroshi Kageyama, Tomoya Fukui, Yasuo Narumi, Koichi Kindo, Takashi Saito, Mikio Takano, Yoshitami Ajiro, Kazuyoshi Yoshimura

Author information

Yoshihiro Tsujimoto
Department of Chemistry, Graduate School of Science, Kyoto University
Yoichi Baba
Department of Chemistry, Graduate School of Science, Kyoto University
Noriaki Oba
Department of Chemistry, Graduate School of Science, Kyoto University
Hiroshi Kageyama
Department of Chemistry, Graduate School of Science, Kyoto University
Institute for Solid State Physics, The University of Tokyo
Tomoya Fukui
Institute for Solid State Physics, The University of Tokyo
Yasuo Narumi
Institute for Solid State Physics, The University of Tokyo
Koichi Kindo
Institute for Solid State Physics, The University of Tokyo
Takashi Saito
Institute for Chemical Research, Kyoto University
Mikio Takano
Institute for Chemical Research, Kyoto University
Yoshitami Ajiro
Department of Chemistry, Graduate School of Science, Kyoto University
CREST, Japan Science and Technology Agency
Kazuyoshi Yoshimura
Department of Chemistry, Graduate School of Science, Kyoto University

Keywords: (CuBr)Sr₂Nb₃O₁₀, square lattice, ion exchange, frustration, magnetization plateau, successive phase transitions

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2007 Volume 76 Issue 6 Pages 063711

DOI https://doi.org/10.1143/jpsj.76.063711

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Abstract

A new triple-layered perovskite (CuBr)Sr₂Nb₃O₁₀ with the S=1⁄2 square lattice has been prepared through a chimie douce route. Presence of strong spin frustration is inferred from zero-field specific heat measurements which exhibit successive phase transitions at 9.3 and 7.5 K. Application of magnetic fields merges the transition temperatures at 3 T, suggesting that the intermediate phase is of magnetic origin with fluctuating spin–spin correlation. Despite the square geometry, magnetization curves have revealed a metamagnetic transition to a novel phase characterized by a 1/3 plateau of the saturated magnetization.

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