Electrical properties in the system (La/sub 1-x/Ca/sub x/)CoO/sub 3/ (0. 1 less than or equal to x less than or equal to 0. 5)

Journal Article · Wed Sep 01 04:00:00 EDT 1982 · J. Solid State Chem.; (United States)

DOI:https://doi.org/10.1016/0022-4596(82)90371-1· OSTI ID:6432196

Taguchi, H ^[1]; Shimada, M; Koizumi, M

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1. Osaka Prefectural Industrial Research Inst., Japan

The electrical resistivity of (La/sub 1-x/Ca/sub x/)CoO/sub 3/(0.1 less than or equal to X less than or equal to0.5) was measured in the temperature range from 80 to 300K. Cobaltite with x less than or equal to 0.15 is a semiconductor, but the specimen with chemical composition 0.2 less than or equal to x less than or equal to 0.5 is metallic. The change of temperature dependence of electrical resistivity has a break point around T/sub c/. The value of the logarithm of the specific electrical resistivity (log p) at 300K has a minimum at x = 0.4, and this result is explained by the Zener double-exchange mechanism.

• OSTI ID: 6432196
• Journal Information: J. Solid State Chem.; (United States), Journal Name: J. Solid State Chem.; (United States) Vol. 44:2; ISSN JSSCB
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKALINE EARTH METAL COMPLEXES
CALCIUM COMPLEXES
CHALCOGENIDES
COBALT COMPOUNDS
COBALT OXIDES
COMPLEXES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PEROVSKITES
PHYSICAL PROPERTIES
RARE EARTH COMPLEXES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS