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- W1965163609 abstract "• Resistivity of all the samples exhibits nonmetallic to metallic behavior in the low temperature region. • Ca 3 Co 3.85 Cu 0.15 O 9 + δ shows the highest dimensionless figure of merit. • The observed effective magnetic moments decrease with increasing Cu content. Ca 3 Co 4– x Cu x O 9 + δ ( x = 0.00, 0.05, 0.07, 0.10 and 0.15) samples were prepared by conventional solid-state synthesis and their thermoelectric properties were systematically investigated. The thermopower of all the samples was positive, indicating that the predominant carriers are holes over the entire temperature range. Ca 3 Co 3.85 Cu 0.15 O 9 + δ had the highest power factor of 2.17 μW cm −1 K −2 at 141 K, representing an improvement of about 64.4% compared to undoped Ca 3 Co 4 O 9 + δ . Magnetization measurements indicated that all the samples exhibit a low-spin state of cobalt ions. The observed effective magnetic moments decreased with increasing copper content." @default.
- W1965163609 created "2016-06-24" @default.
- W1965163609 creator A5082089349 @default.
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- W1965163609 date "2013-11-01" @default.
- W1965163609 modified "2023-09-28" @default.
- W1965163609 title "Thermoelectric and magnetic properties of Ca3Co4–xCuxO9+δ with x=0.00, 0.05, 0.07, 0.10 and 0.15" @default.
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- W1965163609 doi "https://doi.org/10.1016/j.materresbull.2013.07.004" @default.
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