Magnetization process and collective excitations in the s=1/2 triangular-lattice heisenberg antiferromagnet Ba3CoSb 2O9

Takuya Susuki, Nobuyuki Kurita, Takuya Tanaka, Hiroyuki Nojiri, Akira Matsuo, Koichi Kindo, Hidekazu Tanaka

研究成果: Article査読

110 被引用数 (Scopus)

抄録

We have performed high-field magnetization and electronic spin resonance (ESR) measurements on Ba3CoSb2O9 single crystals, which approximates the two-dimensional (2D) S=1/2 triangular-lattice Heisenberg antiferromagnet. For an applied magnetic field H parallel to the ab plane, the entire magnetization curve including the plateau at one-third of the saturation magnetization (Ms) is in excellent agreement with the results of theoretical calculations except a small step anomaly near (3/5)M s, indicative of a theoretically undiscovered quantum phase transition. However, for Hâ̂¥c, the magnetization curve exhibits a cusp near Ms/3 owing to the weak easy-plane anisotropy and the 2D quantum fluctuation. From a detailed analysis of the collective ESR modes observed in the ordered state, combined with the magnetization process, we have determined all the magnetic parameters including the interlayer and anisotropic exchange interactions.

本文言語English
論文番号267201
ジャーナルPhysical review letters
110
26
DOI
出版ステータスPublished - 2013 6 24

ASJC Scopus subject areas

  • Physics and Astronomy(all)

フィンガープリント 「Magnetization process and collective excitations in the s=1/2 triangular-lattice heisenberg antiferromagnet Ba<sub>3</sub>CoSb <sub>2</sub>O<sub>9</sub>」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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