Protonic Conduction in the Single Crystals of SrZr_0.95M_0.05O₃ (M=Y, Sc, Yb, Er)

Abstract

The protonic conductivities of SrZr 0.95 M 0.05 O 3 doped with four acceptor ions (M 3+ =Y 3+ , Sc 3+ , Yb 3+ , Er 3+ ) have been studied in the single crystal form. The protonic conductivity is found in four acceptor ions, indicating that protons migrate by hopping from site to site. The Yb-doped crystal has the lowest activation energy and the highest conductivity amongst the four acceptor ions. This is considered to be due to the difference in strength of the O–H bond with different acceptor doping.