title: Sr7Co4(CO3)O(13-δ) (δ = 1.64), an original cobaltite derivative of the Ruddlesden-Popper series.
abstract: The oxycarbonate Sr7Co4(CO3)O11.36 exhibits a peculiar structure that has been characterized by combining transmission electron microscopy analyses and neutron diffraction. It consists of a regular intergrowth between the m = 2 and carbonated m = 3 members of the Sr(m+1)Co(m)O3(m+1) Ruddlesden-Popper (RP) series, Sr3Co2O5.87 and Sr4Co2(CO3)O5.49, respectively. A description of the structure is proposed to provide identification of the different building blocks. This material is semiconducting and presents a complex magnetic behavior, characteristic of what is observed for the RP(2) or RP(3) series, with a cobalt valency close to 2.7.
authors.affiliation: Laboratoire CRISMAT, UMR CNRS-ENSI Caen 6508, 6 bd Maréchal Juin, 14050 Caen Cedex, France.
authors.forename: A
authors.initials: A
authors.lastname: Demont
authors.forename: D
authors.initials: D
authors.lastname: Pelloquin
authors.forename: S
authors.initials: S
authors.lastname: Hébert
authors.forename: M
authors.initials: M
authors.lastname: Hervieu
authors.forename: J
authors.initials: J
authors.lastname: Höwing
authors.forename: A
authors.initials: A
authors.lastname: Maignan