Study of electrical transport and magnetic properties in CaMn1−x Cu x O3

Abstract: Copper doped, CaMn1−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 =5.276Å, b =5.259Å and c =7.459Å. All samples exhibit antiferromagnetic transitions with Neel temperatures around 124K. 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. [Copyright &y& Elsevier]