title: Magnetic ordering and magnetodielectric phenomena in CoSeO4.
abstract: CoSeO(4) has a structure consisting of edge-sharing chains of Co(2+) octahedra which are held together by SeO(4)(2-) tetrahedra via shared oxygen atoms at the edges of the octahedra. DC magnetization measurements indicate a transition to an ordered state below 30 K. Powder neutron diffraction refinements suggest an ordered state with two unique antiferromagnetic chains within the unit cell. Isothermal magnetization measurements indicate a temperature-dependent field-induced magnetic transition below the ordering temperature. From neutron diffraction, we find that this corresponds to a realignment of spins from the canted configuration towards the c-axis. The dielectric constant shows a change in slope at the magnetic ordering temperature indicating an interplay between the spin and charge degrees of freedom.
authors.affiliation: Materials Department and Materials Research Laboratory, University of California, Santa Barbara, CA 93106, USA. bmelot@mrl.ucsb.edu
authors.forename: Brent C
authors.initials: BC
authors.lastname: Melot
authors.forename: Abby
authors.initials: A
authors.lastname: Goldman
authors.forename: Lucy E
authors.initials: LE
authors.lastname: Darago
authors.forename: Joshua D
authors.initials: JD
authors.lastname: Furman
authors.forename: Efrain E
authors.initials: EE
authors.lastname: Rodriguez
authors.forename: Ram
authors.initials: R
authors.lastname: Seshadri