1. High-Temperature Fuel Cell Research Department, Vali-e-Asr University of Rafsanjan, Rafsanjan 7718897111, Iran
2. Department of Physics, Faculty of Science, University of Guilan, P.O. Box: 41335-1914, Rasht, Iran
3. Department of Physics “E. R. Caianiello”, and “Interdepartmental center NANOMATES”, University of Salerno, Fisciano, 84084 Salerno, Italy