Microwave and optical properties of monoclinic Bi2Zn2/3Nb4/3O7 thin films K. Sudheendran, M.K. Singh, M.G. Krishna and J.K.C. Raju Eur. Phys. J. Appl. Phys., 58 1 (2012) 10303 Published online: 23 April 2012 DOI: 10.1051/epjap/2011100475