title: Size-dependent magnetic properties of single-crystalline multiferroic BiFeO3 nanoparticles.
abstract: As-prepared, single-crystalline bismuth ferrite nanoparticles show strong size-dependent magnetic properties that correlate with: (a) increased suppression of the known spiral spin structure (period length of approximately 62 nm) with decreasing nanoparticle size and (b) uncompensated spins and strain anisotropies at the surface. Zero-field-cooled and field-cooled magnetization curves exhibit spin-glass freezing behavior due to a complex interplay between finite size effects, interparticle interactions, and a random distribution of anisotropy axes in our nanoparticle assemblies.
authors.affiliation: Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, USA.
authors.forename: Tae-Jin
authors.initials: TJ
authors.lastname: Park
authors.forename: Georgia C
authors.initials: GC
authors.lastname: Papaefthymiou
authors.forename: Arthur J
authors.initials: AJ
authors.lastname: Viescas
authors.forename: Arnold R
authors.initials: AR
authors.lastname: Moodenbaugh
authors.forename: Stanislaus S
authors.initials: SS
authors.lastname: Wong