Thermoelectric and magnetic properties of Ca3Co 4-xCuxO9 + δ with x = 0.00, 0.05, 0.07, 0.10 and 0.15

Ankam Bhaskar, Z. R. Lin, Chia-Jyi Liu

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Ca3Co4-xCuxO9 + a(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 3Co3.85Cu0.15O9 + δ had the highest power factor of 2.17 μW cm1 K2 at 141 K, representing an improvement of about 64.4% compared to undoped Ca 3Co4O9+ 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.

Original languageEnglish
Pages (from-to)4884-4888
Number of pages5
JournalMaterials Research Bulletin
Volume48
Issue number11
DOIs
Publication statusPublished - 2013 Jan 1

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Thermoelectric power
Cobalt
Magnetic moments
Copper
Magnetization
Magnetic properties
Ions
magnetic properties
Temperature
cobalt
magnetic moments
solid state
copper
magnetization
synthesis
ions
temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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abstract = "Ca3Co4-xCuxO9 + a(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 3Co3.85Cu0.15O9 + δ had the highest power factor of 2.17 μW cm1 K2 at 141 K, representing an improvement of about 64.4{\%} compared to undoped Ca 3Co4O9+ 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.",
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Thermoelectric and magnetic properties of Ca3Co 4-xCuxO9 + δ with x = 0.00, 0.05, 0.07, 0.10 and 0.15. / Bhaskar, Ankam; Lin, Z. R.; Liu, Chia-Jyi.

In: Materials Research Bulletin, Vol. 48, No. 11, 01.01.2013, p. 4884-4888.

Research output: Contribution to journalArticle

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T1 - Thermoelectric and magnetic properties of Ca3Co 4-xCuxO9 + δ with x = 0.00, 0.05, 0.07, 0.10 and 0.15

AU - Bhaskar, Ankam

AU - Lin, Z. R.

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AB - Ca3Co4-xCuxO9 + a(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 3Co3.85Cu0.15O9 + δ had the highest power factor of 2.17 μW cm1 K2 at 141 K, representing an improvement of about 64.4% compared to undoped Ca 3Co4O9+ 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.

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