title: Spin chirality on a two-dimensional frustrated lattice.
abstract: The collective behaviour of interacting magnetic moments can be strongly influenced by the topology of the underlying lattice. In geometrically frustrated spin systems, interesting chiral correlations may develop that are related to the spin arrangement on triangular plaquettes. We report a study of the spin chirality on a two-dimensional geometrically frustrated lattice. Our new chemical synthesis methods allow us to produce large single-crystal samples of KFe3(OH)6(SO4)2, an ideal Kagomé lattice antiferromagnet. Combined thermodynamic and neutron scattering measurements reveal that the phase transition to the ordered ground-state is unusual. At low temperatures, application of a magnetic field induces a transition between states with different non-trivial spin-textures.
authors.affiliation: Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: Daniel
authors.initials: D
authors.lastname: Grohol
authors.forename: Kittiwit
authors.initials: K
authors.lastname: Matan
authors.forename: Jin-Hyung
authors.initials: JH
authors.lastname: Cho
authors.forename: Seung-Hun
authors.initials: SH
authors.lastname: Lee
authors.forename: Jeffrey W
authors.initials: JW
authors.lastname: Lynn
authors.forename: Daniel G
authors.initials: DG
authors.lastname: Nocera
authors.forename: Young S
authors.initials: YS
authors.lastname: Lee
mesh_terms: D001608:Beryllium / Q000737:chemistry; D018360:Crystallography, X-Ray; D007501:Iron / Q000737:chemistry; D008280:Magnetics; D008422:Materials Testing; D008956:Models, Chemical; D015233:Models, Statistical; D008962:Models, Theoretical; D008968:Molecular Conformation; D009502:Neutrons; D009584:Nitrogen / Q000737:chemistry; D010825:Physics / Q000379:methods; D012542:Scattering, Radiation; D013696:Temperature; D013816:Thermodynamics
chemical_list: D007501:Iron; D009584:Nitrogen; D001608:Beryllium