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Antiferromagnetic Resonance in the Quasi-one-dimensional Magnet IPACu(ClxBr1−x)3 (x=0.83)
Takahito Fujita,Masayuki Hagiwara,Hirotaka Manaka 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
We have performed multi-frequency electron spin resonance (ESR) and magnetization measurementson single crystals of the quasi one-dimensional magnet IPACu(ClxBr1−x)3 (x=0.83) in magneticfields H along the b-axis at temperatures below an antiferromagnetic long-range orderingtemperature (TN ' 13 K). We observed some ESR branches for typical antiferromagnetic modeswith biaxial anisotropy at 1.5 K ( TN). We have analyzed the magnetization curve and the ESRexcitation modes for Hkb by using a two sub-lattice model and obtained good agreement betweenexperiment and calculation. In addition, we show that the origin of a field-induced magnetizationjump is a spin-flop transition. These results show that the phase at temperatures below TN in thisCl-Br mixed compound can be described as a simple two sub-lattice antiferromagnet.