J. Phys. IV France 07 (1997) C1-355-C1-356
EPR and Magnetic Properties of the CanFe2Mnn-2O3n-1 Perovskite Related SeriesM.T. Causa1, M. Tovar1, R.D. Zysler1, M. Vallet-Regí2, J.M. González-Calbet3 and R.D. Sánchez4
1 Centro Atómico Bariloche and Instituto Balseiro, 8400 San Carlos de Bariloche, Argentina
2 Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain
3 Facultad de Química, Universidad Complutense, 28040 Madrid, Spain
4 Facultad de Física, Universidad de Santiago de Compostela, 15706 Santiago de Compostela, Spain
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.
© EDP Sciences 1997