T. FujitaH. YamaguchiS. KimuraT. KashiwagiM. HagiwaraK. MatanD. GroholD. G. NoceraY. S. LeeOsaka UniversityMahidol UniversityThe Dow Chemical CompanyMassachusetts Institute of TechnologyOsaka Prefecture UniversityInstitute for Materials Research, Tohoku UniversityUniversity of Tsukuba2018-06-112018-06-112012-03-06Physical Review B - Condensed Matter and Materials Physics. Vol.85, No.9 (2012)1550235X109801212-s2.0-84863249789https://repository.li.mahidol.ac.th/handle/20.500.14594/14380We have performed high-field multifrequency electron spin resonance (ESR) and high-field magnetization measurements in magnetic fields H of up to 53 T on single crystals of the kagome-lattice antiferromagnet KFe 3 (OH) 6 (SO 4 ) 2 . We have analyzed the magnetization curve and the ESR excitation modes for Hc by using two kinds of anisotropy origins, the Dzyaloshinsky-Moriya (DM) interactions and the single-ion anisotropy, the former of which is inevitable in a kagome-lattice antiferromagnet. We obtained good agreement between experiment and calculation for the case of the DM interactions. In addition, we have clarified the origin of a field-induced metamagnetic transition observed in the magnetization curve and determined the intraplane and interplane exchanges and the DM interaction parameters. © 2012 American Physical Society.Mahidol UniversityMaterials SciencePhysics and AstronomyArticleSCOPUS10.1103/PhysRevB.85.094409