Structural and magnetic investigation of Ca2MnReO6 doped with Ce

We have studied the properties of Ce doping in Ca-site of Ca2MnReO6 double perovskite up to 10%. These compounds have presented a monoclinic cell with P2(1)/n space group. A small increase of lattice parameters in doped sample were observed through Rietveld refinement of X-ray diffraction pattern. The spectra at the Mn K-edge and Re L3-edge showed a mixed valence for Mn and Re in both samples. We do not observed any variation on Mn K-edge valence in XANES measurements under pressure. However a change was observed for Re L3-edge as a function of applied pressure. The Ce-doped sample showed a magnetic geometric frustration and a small decrease of the temperature frustration as compared with Ca2MnReO6 sample. The decrease of temperature frustration can be related to the MnO6 and ReO6 octahedral distortion.

Bibliographic Details

Main Authors:	Depianti,J. B., Orlando,M. T. D., Cavichini,A. S., Corrêa,H. P. S., Rodrigues,V. A., Passamai,J. L., Piedade,E. L. O, Belich,H., Medeiros,E. F., Melo,F. C. L. de
Format:	Digital revista
Language:	English
Published:	Associação Brasileira de Cerâmica 2013
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132013000200011
Tags:	Add Tag No Tags, Be the first to tag this record!