The effects of microstructure, Nb content and secondary Ruddlesden-Popper phase on thermoelectric properties in perovskite CaMn_1-x Nb _x O₃ (x = 0-0.10) thin films.

ABSTRACT: CaMn_1-x Nb _x O₃ (x = 0, 0.5, 0.6, 0.7 and 0.10) thin films have been grown by a two-step sputtering/annealing method. First, rock-salt-structured (Ca,Mn_1-x ,Nb _x )O thin films were deposited on 11̄00 sapphire using reactive RF magnetron co-sputtering from elemental targets of Ca, Mn and Nb. The CaMn_1-x Nb _x O₃ films were then obtained by thermally induced phase transformation from rock-salt-structured (Ca,Mn_1-x Nb _x )O to orthorhombic during post-deposition annealing at 700 °C for 3 h in oxygen flow. The X-ray diffraction patterns of pure CaMnO₃ showed mixed orientation, while Nb-containing films were epitaxi

SUBMITTER: Ekstrom E 

PROVIDER: S-EPMC9049944 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature