Open AccessOxygen pressure effect on lattice parameters of SrTiO3 and SrNb0.2Ti0.8O3 thin films and laser-induced thermoelectric voltages effect
Author(s) -
Ting Liu,
Tan Song-Lin,
Hui Zhou,
Qin Yi,
Pengxiang Zhang
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.4424
Subject(s) - materials science , thin film , vicinal , pulsed laser deposition , oxygen , lattice constant , thermoelectric effect , diffraction , substrate (aquarium) , lattice (music) , partial pressure , condensed matter physics , laser , nanotechnology , optics , thermodynamics , physics , acoustics , chemistry , oceanography , organic chemistry , geology
SrTiO3 and SrNb0.2Ti0.8O3 thin films were prepared by pulsed laser deposition technique on LaAlO3 (100) single crystal substrates. X-ray diffraction shows that all the thin films have001 orientation. With the oxygen pressure increasing, the lattice parameter c of SrTiO3 thin films decreases, while the lattice parameter c of SrNb0.2Ti0.8O3 thin films decreases and then increases. Meanwhile, the optimal oxygen pressure to prepare (SrTiO3/SrNb0.2Ti0.8O3)L multilayer of two-dimensional electron gas was found to be 1.0×10-2Pa. In addition, laser-induced thermoelectric voltage effect was observed on SrNb0.2Ti0.8O3 thin film prepared on vicinal-cut LaAlO3 (100) substrate for the first time.