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325 degrees C thermoluminescence peak growth in quartz related to oxygen vacancies
(Gordon Breach Sci Publ Ltd, 1998-01-01)
The thermoluminescence intensity as a function of gamma-ray dose of the 325 degreesC peak, in quartz grains extracted from sea sediments and from fluvial aeolic dunes, is studied. It is found that the response curve at low ...
An ab initio study of oxygen vacancies and doping process of Nb and Cr atoms on TiO2 (110) surface models
(Wiley-Blackwell, 1997-12-05)
We theoretically investigated how the formation of oxygen vacancies and the addition of niobium and chromium atoms as dopants modify the varistor properties of TiO2. The calculations were carried out at the HF level using ...
An Ab initio study of oxygen vacancies and doping process of Nb and Cr atoms on TiO2 (110) surface models
(1997-01-01)
We theoretically investigated how the formation of oxygen vacancies and the addition of niobium and chromium atoms as dopants modify the varistor properties of TiO2. The calculations were carried out at the HF level using ...
Oxygen related defects excitation and photoconductivity dependence of SnO2 sol-gel films with several light sources
(1999-12-01)
Since oxygen vacancies act as donors in SnO2, the electrical properties are related to deviation from stoichiometric composition. Depending on stoichiometry SnO2 can be highly insulating or may exhibit fairly high n-type ...
Tuning the insulator-metal transition in oxide interfaces: an ab initio study exploring the role of oxygen vacancies and cation interdiffusion
(Wiley VCH Verlag, 2014-07)
We investigate the structural, electronic, and magnetic properties of a particular interface in the oxide heterostructures LaAlOmath formula/SrTiOmath formula (LAO/STO) and TiOmath formula-anatase/LaAlOmath formula (TiOmath ...
Ionized oxygen vacancy-related electrical conductivity in (Pb(1-x)La(x)) (Zr(0.90)Ti(0.10))(1-x/4)O(3) ceramics
(Iop Publishing Ltd, 2008-11-07)
The electrical conductivity behaviour in the paraelectric state has been investigated in lanthanum modified lead zirconate titanate (PLZT) ceramics, considering the universal relaxation law. The contribution of conductive ...
The role of oxygen vacancies on the microstructure development and on the electrical properties of SnO2-based varistors
(Springer, 2005-03-01)
Variations on the microstructure development and on the electrical properties of SnO2-based varistors are discussed on the basis of the oxygen vacancies created or annihilated by the presence of different additives. Electron ...
The role of oxygen vacancy in the photoluminescence property at room temperature of the CaTiO3
(American Institute of Physics (AIP), 2009-08-15)
In this paper, electron paramagnetic resonance, photoluminescence (PL) emission, and quantum mechanical calculations were used to observe and understand the structural order-disorder of CaTiO3, paying special attention to ...
The role of oxygen vacancies and their location in the magnetic properties of Ce1-xCuxO2-delta nanorods
(Royal Soc Chemistry, 2015-01-01)
Ceria (CeO2) is a promising dilute magnetic semiconductor. Several studies report that the intrinsic and extrinsic structural defects are responsible for room temperature ferromagnetism in undoped and transition metal doped ...