title: Pressure-enhanced 3D antiferromagnetic correlations in La(1.4)Sr(1.6)Mn(2)O(7).
abstract: Pressure effects on the stability of magnetic phases in La(1.4)Sr(1.6)Mn(2)O(7) have been studied using magnetization measurements and neutron diffraction. At ambient conditions this material is a quasi-two-dimensional ferromagnet. On cooling it becomes ordered three dimensionally: at 90 K La(1.4)Sr(1.6)Mn(2)O(7) it becomes an antiferromagnet, and at 65 K it undergoes a transition into a ferromagnetic phase. Using neutron diffraction techniques on a single crystal of La(1.4)Sr(1.6)Mn(2)O(7) it has been shown that these two magnetic phases belong to a single structural phase and do not coexist at low temperatures. The application of pressure enhances the antiferromagnetic correlations between the Mn(2)O(9) bilayers.
authors.affiliation: Department of Physics and Astronomy, The University of Edinburgh, Mayfield Road, Edinburgh EH9 3JZ, United Kingdom.
authors.forename: K V
authors.initials: KV
authors.lastname: Kamenev
authors.forename: G J
authors.initials: GJ
authors.lastname: McIntyre
authors.forename: Z
authors.initials: Z
authors.lastname: Arnold
authors.forename: J
authors.initials: J
authors.lastname: Kamarád
authors.forename: M R
authors.initials: MR
authors.lastname: Lees
authors.forename: G
authors.initials: G
authors.lastname: Balakrishnan
authors.forename: E M
authors.initials: EM
authors.lastname: Chung
authors.forename: D M
authors.initials: DM
authors.lastname: Paul