Study of electrical transport and magnetic properties in CaMn1-xCuxO3

Copper doped, CaMn(1-x)Cu(x)O3 compounds have been prepared in single phase form for x=0-0.20. XRD patterns could be analyzed using Pbnm space group with typical lattice parameters a = 5.276 angstrom, b = 5.259 angstrom and c = 7.459 angstrom. All samples exhibit antiferromagnetic transitions with Neel temperatures around 124 K. The temperature variations of electrical resistivity follow the semi-conducting behaviour and they could be analyzed using variable range hopping with Coulomb interaction (ES-VRH) model. The Cu doping is found to enhance the antiferromagnetic interactions. (c) 2006 Elsevier B.V. All rights reserved.