Abstract
The conductivities and Seebeck coefficients of polycrystalline Sr 1−yLa yTi 1−xMg xO 3(y=0, 0.05, x=0−0.1) were measured as a function of oxygen partial pressure and temperature. When Mg 2+ ions are doped as acceptor for Ti 3+, the concentration of oxygen vacancy increased and p-type semiconductivity was promoted. However, when La 3+ ions are doped as donor for Sr 2+, the concentration of oxygen vacancy decreased and n-type semiconduction was dominant. The carrier concentration changed with P O 2 , while the mobility was unaffected.
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