2017年2月
Dzyaloshinsky-Moriya Interaction and the Ground State in S=3/2 Perfect Kagome Lattice Antiferromagnet KCr3(OH)(6)(SO4)(2) (Cr-Jarosite) Studied by X-Band and High-Frequency ESR
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
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- 巻
- 86
- 号
- 2
- 開始ページ
- 024703
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.7566/JPSJ.86.024703
- 出版者・発行元
- PHYSICAL SOC JAPAN
A single-crystal S = 3/2 perfect kagome lattice antiferromagnet, KCr3(OH)(6)(SO4)(2) (Cr-jarosite), has been studied by X-band and high-frequency electron spin resonance (ESR). The g-values perpendicular to the kagome plane (c-axis) and in the plane were determined to be g(c) = 1.9704 +/- 0.0002 and g(xi) = 1.9720 +/- 0.0003, respectively, by high-frequency ESR observed at 265 K. Antiferromagnetic resonances (AFMRs) with an antiferromagnetic gap of 120 GHz were observed at 1.9 K, which is below T-N = 4.5 K. The analysis of AFMR modes using the conventional molecular field theory gave d(p) = 0.27K and d(z) = 0.07 K, where d(p) and d(z) are in-plane and out-of-plane components of d vector of the Dzyaloshinsky-Moriya (DM) interaction, respectively. On the basis of these results and the exchange interaction of J = 6.15K estimated by Okuta et al., the ground state of Cr-jarosite was discussed in connection with the Monte Carlo simulation results with classical Heisenberg spins on the kagome lattice by Elhajal et al. Finally, the angular dependence of the linewidth and lineshape observed at 296K by X-band ESR showed the typical behavior of a two-dimensional Heisenberg antiferromagnet, suggesting the good two-dimensionality of Cr-jarosite.
- リンク情報
- ID情報
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- DOI : 10.7566/JPSJ.86.024703
- ISSN : 0031-9015
- Web of Science ID : WOS:000391861500018