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ZnO thin film growth prefers different orientations on the etched and unetched SrTiO 3(STO)(110) substrates.Inclined ZnO and cobalt-doped ZnO(ZnCoO) thin films are grown on unetched STO(110) substrates using oxygen plasma assisted molecular beam epitaxy,with the c-axis 42 inclined from the normal STO(110) surface.The growth geometries are ZnCoO[100]//STO[110] and ZnCoO[111]//STO[001].The low temperature photoluminescence spectra of the inclined ZnO and ZnCoO films are dominated by D 0 X emissions associated with A 0 X emissions,and the characteristic emissions for the 2 E(2G)→ 4A2(4F) transition of Co 2+ dopants and the relevant phonon-participated emissions are observed in the ZnCoO film,indicating the incorporation of Co 2+ ions at the lattice positions of the Zn 2+ ions.The c-axis inclined ZnCoO film shows ferromagnetic properties at room temperature
ZnO thin film growth prefers different orientations on the etched and unetched SrTiO 3 (STO) (110) substrates. Inclined ZnO and cobalt-doped ZnO (ZnCoO) thin films are grown on unetched STO (110) substrates using oxygen plasma assisted molecular beam epitaxy , with the c-axis 42 inclined from the normal STO (110) surface.The growth geometries are ZnCoO [100] // STO [110] and ZnCoO [111] // STO [001]. The low temperature photoluminescence spectra of the inclined ZnO and ZnCoO films are dominated by D 0 X emissions associated with A 0 X emissions, and the characteristic emissions for the 2 E (2G) → 4A2 (4F) transition of Co 2+ dopants and the relevant phonon-delivered emissions are observed in the ZnCoO film, indicating the incorporation of Co 2+ ions at the lattice positions of the Zn 2+ ions. c-axis inclined ZnCoO film shows ferromagnetic properties at room temperature