title: Magnetic structure of CuCrO₂: a single crystal neutron diffraction study.
abstract: This paper presents results of a recent study of multiferroic CuCrO(2) by means of single crystal neutron diffraction. This system has two close magnetic phase transitions at T(N) = 24.2 K and T(mf) = 23.6 K. The low temperature magnetic structure below T(mf) is unambiguously determined to be a fully three-dimensional proper screw. Between T(N) and T(mf) antiferromagnetic order is found that is essentially two-dimensional. In this narrow temperature range, magnetic near neighbor correlations are still long range in the (H,K) plane, whereas nearest neighbors along the L direction are uncorrelated. Thus, the multiferroic state is realized only in the low temperature three-dimensional state and not in the two-dimensional state.
authors.affiliation: Neutron Scattering Science Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA. frontzekmd@ornl.gov
authors.forename: M
authors.initials: M
authors.lastname: Frontzek
authors.forename: G
authors.initials: G
authors.lastname: Ehlers
authors.forename: A
authors.initials: A
authors.lastname: Podlesnyak
authors.forename: H
authors.initials: H
authors.lastname: Cao
authors.forename: M
authors.initials: M
authors.lastname: Matsuda
authors.forename: O
authors.initials: O
authors.lastname: Zaharko
authors.forename: N
authors.initials: N
authors.lastname: Aliouane
authors.forename: S
authors.initials: S
authors.lastname: Barilo
authors.forename: S V
authors.initials: SV
authors.lastname: Shiryaev