title: The ordering of XY spin glasses.
abstract: Ordering properties of XY-like spin-glass magnets with an easy-plane magnetic anisotropy are studied based on a symmetry consideration and the results of recent numerical simulations on the pure Heisenberg and XY spin-glass models. The effects of an easy-plane-type uniaxial anisotropy, a random magnetic anisotropy and an applied magnetic field are investigated. In the XY regime in zero field, the 'spin-chirality decoupling' persists even under the random magnetic anisotropy, escaping the 'spin-chirality recoupling' phenomenon which inevitably occurs in the Heisenberg regime. Contrast between the scalar chiral order and the vector chiral order is emphasized. Implications for experiments are discussed.
authors.affiliation: Department of Earth and Space Science, Faculty of Science, Osaka University, Toyonaka 560-0043, Japan. kawamura@ess.sci.osaka-u.ac.jp
authors.forename: Hikaru
authors.initials: H
authors.lastname: Kawamura