TY - JOUR
T1 - Non-stoichiometry, Fermi energy and work function of (La,Sr)MnO3. II. Verification of theoretical model
AU - Bak, T.
AU - Nowotny, Janusz
AU - Rekas, M.
AU - Sorrell, C. C.
PY - 2001/4
Y1 - 2001/4
N2 - A model describing the relationship between nonstoichiometry and Fermi energy was used to determine the effect of oxygen partial pressure on semiconducting properties of perovskite-type oxide materials, such as (La,Sr)MnO3. Specifically, this model was used to determine the electrical effects at the gas/solid interface for the oxygen/metal oxide system with specific respect to oxygen non-stoichiometry and oxygen chemisorption. It was found that oxidation of (La0.8Sr0.2)MnO3 at both 1023 and 1073 K, corresponding to changes of p(O2) in the range 10 and 21 kPa, results in the formation of a chemisorption-related surface potential barriers that assumes 0.165 V while oxidation at 1123 K leads to oxygen incorporation without changes in chemisorption equilibrium.
AB - A model describing the relationship between nonstoichiometry and Fermi energy was used to determine the effect of oxygen partial pressure on semiconducting properties of perovskite-type oxide materials, such as (La,Sr)MnO3. Specifically, this model was used to determine the electrical effects at the gas/solid interface for the oxygen/metal oxide system with specific respect to oxygen non-stoichiometry and oxygen chemisorption. It was found that oxidation of (La0.8Sr0.2)MnO3 at both 1023 and 1073 K, corresponding to changes of p(O2) in the range 10 and 21 kPa, results in the formation of a chemisorption-related surface potential barriers that assumes 0.165 V while oxidation at 1123 K leads to oxygen incorporation without changes in chemisorption equilibrium.
UR - http://www.scopus.com/inward/record.url?scp=0035311598&partnerID=8YFLogxK
U2 - 10.1016/S0022-3697(00)00231-6
DO - 10.1016/S0022-3697(00)00231-6
M3 - Article
AN - SCOPUS:0035311598
SN - 0022-3697
VL - 62
SP - 737
EP - 742
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
IS - 4
ER -