Conduction Mechanisms of Y, Cu, Li, and $Pb(Zn_{1/3}Nb_{2/3})O_3$ Compound-doped $0.2[Pb(Mg_{1/3}Nb_{2/3})O_3]-0.8[Pb(Zr_{0.475}Ti_{0.525})O_3]$ Pyroelectric Ceramics

Park, Eun-Chul (School of Materials Science and Engineering, University of Ulsan) ;
Kwon, Jeong-Ho (School of Materials Science and Engineering, University of Ulsan) ;
Lee, Jae-Shin (School of Materials Science and Engineering, University of Ulsan) ;
Kang, Sun-Hee (Department of Physics, University of Ulsan) ;
Lee, Hai-Joon (Department of Physics, University of Ulsan) ;
Lee, Dae-Su (Department of Physics, University of Ulsan) ;
Kim, Ill-Won (Department of Physics, University of Ulsan)