EPR and Magnetic Properties of the Ca n Fe 2 Mn n-2 O 3n-1 Perovskite Related Series

CAUSA, M. T.; TOVAR, M.; ZYSLER, R. D.; VALLET-REGÍ, M.; GONZÁLEZ-CALBET, J. M.; SÁNCHEZ, R. D.

JOURNAL DE PHYSIQUE IV

EDP Sciences

Lugar: Paris; Año: 1997 vol. 07 p. 355 - 356

1155-4339

We present EPR and Susceptibility measurements performed on the perovskite-like family CanFe2Mnn-2O3n-1. On going from n=2 to n=3 Fe3+ is progressively replaced by Mn4+. As a consequence the ordering temperature is depressed and frustrations in the magnetic interactions were found. The measurements are compared with the previously studied system CanFe2Tin-2O3n-1, where magnetic Mn4+ were replaced by non magnetic Ti4+. We discuss the results in terms of cationic ordering and super exchange interactions.