title: Slow magnetic order-order transition in the spin chain antiferromagnet Ca3Co2O6.
abstract: Using powder neutron diffraction, we have discovered an unusual magnetic order-order transition in the Ising spin chain compound Ca3Co2O6. On lowering the temperature, an antiferromagnetic phase with a propagation vector k=(0.5,-0.5,1) emerges from a higher temperature spin density wave structure with k=(0,0,1.01). This transition occurs over an unprecedented time scale of several hours and is never complete.
authors.affiliation: Laboratoire CRISMAT, CNRS UMR 6508, ENSICAEN-Boulevard du Maréchal Juin, 14050 Caen, France.
authors.forename: S
authors.initials: S
authors.lastname: Agrestini
authors.forename: C L
authors.initials: CL
authors.lastname: Fleck
authors.forename: L C
authors.initials: LC
authors.lastname: Chapon
authors.forename: C
authors.initials: C
authors.lastname: Mazzoli
authors.forename: A
authors.initials: A
authors.lastname: Bombardi
authors.forename: M R
authors.initials: MR
authors.lastname: Lees
authors.forename: O A
authors.initials: OA
authors.lastname: Petrenko