Antiferromagnetic resonance in the quasi-one-dimensional magnet IPACu(ClxBr1−x)3 (x=0.83)

We have performed multi-frequency electron spin resonance (ESR) and magnetization measurements on single crystals of the quasi one-dimensional magnet IPACu(Cl x Br 1− x ) 3 ( x =0.83) in magnetic fields H along the b -axis at temperatures below an antiferromagnetic long-range ordering temperature (...

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Bibliographic Details
Published in:Journal of the Korean Physical Society 2013, 62(12), , pp.2073-2076
Main Authors: Fujita, Takahito, Hagiwara, Masayuki, Manaka, Hirotaka
Format: Article
Language:English
Subjects:
Mathematical and Computational Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Theoretical
물리학
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Summary:We have performed multi-frequency electron spin resonance (ESR) and magnetization measurements on single crystals of the quasi one-dimensional magnet IPACu(Cl x Br 1− x ) 3 ( x =0.83) in magnetic fields H along the b -axis at temperatures below an antiferromagnetic long-range ordering temperature ( T N ≅ 13 K). We observed some ESR branches for typical antiferromagnetic modes with biaxial anisotropy at 1.5 K (≪ T N ). We have analyzed the magnetization curve and the ESR excitation modes for H ∥ b by using a two sub-lattice model and obtained good agreement between experiment and calculation. In addition, we show that the origin of a field-induced magnetization jump is a spin-flop transition. These results show that the phase at temperatures below T N in this Cl-Br mixed compound can be described as a simple two sub-lattice antiferromagnet.
ISSN:0374-4884
1976-8524
DOI:10.3938/jkps.62.2073