title: The Almeida-Thouless line in BiFeO(3): is bismuth ferrite a mean field spin glass?
abstract: Low-temperature magnetic properties of epitaxial BiFeO(3) (BFO) thin films grown on (111) SrTiO(3) substrates have been studied. Zero-field-cooled and field-cooled magnetization curves show a large discrepancy beginning at a characteristic temperature T(f) that is dependent on the magnetic field strength. T(f)(H) varies according to the well known de Almeida-Thouless line [Formula: see text] suggesting an acentric long-range spin-glass behavior and mean field system.
authors.affiliation: Department of Physics and Institute of Functional Nano Materials, University of Puerto Rico, PR 00931-3343, USA.
authors.forename: Manoj K
authors.initials: MK
authors.lastname: Singh
authors.forename: Ram S
authors.initials: RS
authors.lastname: Katiyar
authors.forename: W
authors.initials: W
authors.lastname: Prellier
authors.forename: J F
authors.initials: JF
authors.lastname: Scott