title: Neutron diffraction study and magnetic properties of La(1-x)Ba(x)CoO(3) (x = 0.2 and 0.3).
abstract: The magnetic properties together with the crystal and magnetic structures of the cobaltites La(1-x)Ba(x)CoO(3) (for x = 0.2 and 0.3) are determined by DC magnetization, AC magnetic susceptibility and neutron powder diffraction measurements over a broad spectrum of temperatures. For x = 0.3 a rhombohedral structure with space group [Formula: see text] is maintained at all temperatures below 300 K. On the other hand, for x = 0.2 the refinement of the neutron data below 150 K indicates the coexistence of two structures, [Formula: see text] (rhombohedral) and Pbnm (orthorhombic), respectively, in a ratio of ∼48/52. Both compounds (x = 0.2 and 0.3) show a ferromagnetic long range order. The data fit well with the Co(3+) ions in the intermediate spin state and the Co(4+) ions in a low spin state.
authors.affiliation: SSPA 'Scientific-Practical Materials Research Center of NAS of Belarus', BY-220072 Minsk, Belarus. Institute of Crystallography, RWTH Aachen University, D-52056 Aachen, Germany.
authors.forename: A P
authors.initials: AP
authors.lastname: Sazonov
authors.forename: I O
authors.initials: IO
authors.lastname: Troyanchuk
authors.forename: H
authors.initials: H
authors.lastname: Gamari-Seale
authors.forename: V V
authors.initials: VV
authors.lastname: Sikolenko
authors.forename: K L
authors.initials: KL
authors.lastname: Stefanopoulos
authors.forename: G K
authors.initials: GK
authors.lastname: Nicolaides
authors.forename: Y K
authors.initials: YK
authors.lastname: Atanassova