(3+1)D superspace structural determination of two new modulated composite phases: Sr1+x(CuxMn1−x)O3; x=3/11 and x=0.3244

Ahmed El Abed (1, 2) , Etienne Gaudin (1) , Hans-Conrad Zur Loye (3) , Jacques Darriet (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
2 Laboratoire de Chimie du Solide Minéral
3 Department of Chemistry and Biochemistry [Columbia, South Carolina]

We report the structure determination of two new phases belonging to the A1+x(A′xB1−x)O3 family of oxides with A=Sr, A′=Cu, and B=Mn, where x=3/11 and x=0.3244, corresponding to a commensurate and incommensurate composite structure, respectively. These two compounds are the first examples of oxides belonging to the Sr1+x(CuxMn1−x)O3 family. Their structures were solved in the (3+1) dimensional superspace formalism as modulated composite structures with two subsystems [(Cu,Mn)O3] and [Sr]. The superspace group used to solve the structures is ...

Mots clés: Perovskite; Composite structure; Modulation; Magnetic properties; Spin exchange interaction

Domaines: Matériaux

Ahmed El Abed, Etienne Gaudin, Hans-Conrad Zur Loye, Jacques Darriet. (3+1)D superspace structural determination of two new modulated composite phases: Sr1+x(CuxMn1−x)O3; x=3/11 and x=0.3244. Solid State Sciences, 2003, 5 (1), pp.59-71. ⟨10.1016/S1293-2558(02)00081-X⟩. ⟨hal-00257900⟩