High-Field and Multi-Frequency ESR in the Quasi Two-Dimensional Triangular-Lattice Antiferromagnet CuCrO2

We have performed high-field and multi-frequency electron spin resonance (ESR) and magnetization measurements in magnetic fields up to about 53 T on single crystals of a delafossite triangular-lattice antiferromagnet CuCrO 2 , which has been proposed to show an out-of-plane 120° spiral spin structur...

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Bibliographic Details
Published in:Journal of low temperature physics 2010-04, Vol.159 (1-2), p.130-133
Main Authors: Yamaguchi, H., Otomo, S., Kimura, S., Hagiwara, M., Kimura, K., Kimura, T., Kindo, K.
Format: Article
Language:English
Subjects:
Antiferromagnetism
Characterization and Evaluation of Materials
Condensed Matter Physics
Electron paramagnetic resonance
Electron spin resonance
Magnetic fields
Magnetic Materials
Magnetism
Magnetization
Mathematical analysis
Physics
Physics and Astronomy
Spin structure
Spirals
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Summary:We have performed high-field and multi-frequency electron spin resonance (ESR) and magnetization measurements in magnetic fields up to about 53 T on single crystals of a delafossite triangular-lattice antiferromagnet CuCrO 2 , which has been proposed to show an out-of-plane 120° spiral spin structure below about 24 K. We calculated ESR resonance modes and magnetization curves assuming an Ising-like Heisenberg Hamiltonian with a spiral spin structure by a mean-field theory. The experimental results can be well reproduced using the following parameters, the intralayer exchange constant J / k B =26.9 K, the easy-axis anisotropy D / k B =−0.47 K, and the in-plane g-factor g ab =2.0.
ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-009-0083-9