Author/Authors :
Chen، نويسنده , , L. and Chen، نويسنده , , C.L. and Huang، نويسنده , , D.X. and Lin، نويسنده , , Y. and Chen، نويسنده , , X. and Jacobson، نويسنده , , A.J.، نويسنده ,
Abstract :
Single-crystalline epitaxial Gd-doped CeO2 (GCO, Gd0.2Ce0.8O1.9) thin films were grown on (001) NdGaO3 (NGO) and LaAlO3 (LAO) substrates through pulsed-laser deposition. The electrical conductivity was investigated by AC impedance spectroscopy. The temperature dependence of the electrical conductivity gives an activation energy of 0.74 eV for GCO/NGO and a conductivity which is very close to that of the bulk polycrystalline material. For GCO films deposited on LAO, the conductivity of the substrate makes a significant contribution to the total measured conductivity.
Keywords :
Epitaxial thin films , Impedance spectroscopy , Gadolinia-doped ceria , electrical conductivity
