EPR studies of the triangular-lattice antiferromagnet Cs2CuBr4

Автор(и)

  • E. Schulze Dresden High Magnetic Field Laboratory (HLD-EMFL) Helmholtz-Zentrum Dresden-Rossendorf, D-01328 Dresden, Germany
  • A.N. Ponomaryov Dresden High Magnetic Field Laboratory (HLD-EMFL) Helmholtz-Zentrum Dresden-Rossendorf, D-01328 Dresden, Germany
  • J. Wosnitza Dresden High Magnetic Field Laboratory (HLD-EMFL) Helmholtz-Zentrum Dresden-Rossendorf, D-01328 Dresden, Germany
  • H. Tanaka Tokyo Institute of Technology, Tokyo 152-8550, Japan
  • S.A. Zvyagin Dresden High Magnetic Field Laboratory (HLD-EMFL) Helmholtz-Zentrum Dresden-Rossendorf, D-01328 Dresden, Germany

DOI:

https://doi.org/10.1063/1.5010318

Ключові слова:

antiferromagnet, EPR, Dzyaloshinskii–Moriya interaction.

Анотація

The spin dynamics of the spin-1/2 triangular-lattice antiferromagnet Cs2CuBr4 is probed by means of high-frequency electron paramagnetic resonance (EPR) spectroscopy. Temperature dependences of EPR parameters are studied in a broad temperature range between 1.4 and 200 K for different orientations of the applied magnetic field. In the high-temperature regime (T >> J/kB), an unusually broad and anisotropic resonance line is detected, suggesting a sizeable Dzyaloshinskii–Moriya interaction. Employing the theory of exchange narrowing, the ratio of the Dzyaloshinskii–Moriya vector components, Dc/Da ≈ 0.3, is estimated.

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Опубліковано

2019-04-24

Як цитувати

(1)
Schulze, E.; Ponomaryov, A.; Wosnitza, J.; Tanaka, H.; Zvyagin, S. EPR Studies of the Triangular-Lattice Antiferromagnet Cs2CuBr4. Fiz. Nizk. Temp. 2019, 43, 1642-1647.

Номер

Том 43 № 11 (2017)

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