Electron doping in CaMnO3 induced by Mo for Mn substitution:: An efficient route to orbital and charge ordering -: art. no. 100406

The magnetic, transport, and structural investigations of the CaMn1-xMoxO3 manganites show that orbital and charge ordering are induced by Mn-site doping in pure calcium based manganites. Starting from a cluster glass behavior at x approximate to0.04, orbital ordering is evidenced for x approximate to0.10, whereas charge ordering (characterized by an incommensurate structure with q approximate to0.02-0.25) is obtained for x approximate to0.12 with a high-T(Co)approximate to 300 K. This charge ordering effect induced by Mo doping is interpreted in terms of a high valency effect.