Thermoelectric properties of epitaxial and topotaxial Na xCoO 2 thin films

A. Venimadhav, Z. Ma, Qi Li, A. Soukiassian, X. X. Xi, D. G. Schlom, R. Arroyave, Zi-kui Liu, Minhyea Lee, N. P. Ong

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

We report structural, electrical, and thermopower properties of epitaxial and topotaxial Na xCoO 2 thin films on (0001) sapphire substrate. Topotaxial Na xCoO 2 films were prepared by converting an epitaxial Co 3O 4 film to Na xCoO 2 by annealing in Na vapor and epitaxial Na xCoO 2 films were obtained by pulsed laser deposition. All the films are c-axis oriented. For topotaxial films, annealing in different Na vapor pressures resulted in films with different Na concentrations, which showed distinct transport properties. For directly deposited epitaxial films by pulsed laser deposition, deposition parameters are found to control the Na concentration and hence the film properties. The largest thermoelectric power of the samples made by different methods is found to be similar in the range of 70-100 μV/K at room temperature.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposium Proceedings
Pages65-74
Number of pages10
StatePublished - May 8 2006
Event2005 Materials Research Society Fall Meeting - Boston, MA, United States
Duration: Nov 28 2005Dec 1 2005

Publication series

NameMaterials Research Society Symposium Proceedings
Volume886
ISSN (Print)0272-9172

Other

Other2005 Materials Research Society Fall Meeting
CountryUnited States
CityBoston, MA
Period11/28/0512/1/05

Fingerprint

Thin films
thin films
Thermoelectric power
Pulsed laser deposition
pulsed laser deposition
Annealing
Aluminum Oxide
Epitaxial films
annealing
Vapor pressure
Sapphire
Transport properties
vapor pressure
Vapors
sapphire
transport properties
electrical properties
vapors
Substrates
room temperature

All Science Journal Classification (ASJC) codes

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

Cite this

Venimadhav, A., Ma, Z., Li, Q., Soukiassian, A., Xi, X. X., Schlom, D. G., ... Ong, N. P. (2006). Thermoelectric properties of epitaxial and topotaxial Na xCoO 2 thin films. In Materials Research Society Symposium Proceedings (pp. 65-74). (Materials Research Society Symposium Proceedings; Vol. 886).
Venimadhav, A. ; Ma, Z. ; Li, Qi ; Soukiassian, A. ; Xi, X. X. ; Schlom, D. G. ; Arroyave, R. ; Liu, Zi-kui ; Lee, Minhyea ; Ong, N. P. / Thermoelectric properties of epitaxial and topotaxial Na xCoO 2 thin films. Materials Research Society Symposium Proceedings. 2006. pp. 65-74 (Materials Research Society Symposium Proceedings).
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abstract = "We report structural, electrical, and thermopower properties of epitaxial and topotaxial Na xCoO 2 thin films on (0001) sapphire substrate. Topotaxial Na xCoO 2 films were prepared by converting an epitaxial Co 3O 4 film to Na xCoO 2 by annealing in Na vapor and epitaxial Na xCoO 2 films were obtained by pulsed laser deposition. All the films are c-axis oriented. For topotaxial films, annealing in different Na vapor pressures resulted in films with different Na concentrations, which showed distinct transport properties. For directly deposited epitaxial films by pulsed laser deposition, deposition parameters are found to control the Na concentration and hence the film properties. The largest thermoelectric power of the samples made by different methods is found to be similar in the range of 70-100 μV/K at room temperature.",
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Venimadhav, A, Ma, Z, Li, Q, Soukiassian, A, Xi, XX, Schlom, DG, Arroyave, R, Liu, Z, Lee, M & Ong, NP 2006, Thermoelectric properties of epitaxial and topotaxial Na xCoO 2 thin films. in Materials Research Society Symposium Proceedings. Materials Research Society Symposium Proceedings, vol. 886, pp. 65-74, 2005 Materials Research Society Fall Meeting, Boston, MA, United States, 11/28/05.

Thermoelectric properties of epitaxial and topotaxial Na xCoO 2 thin films. / Venimadhav, A.; Ma, Z.; Li, Qi; Soukiassian, A.; Xi, X. X.; Schlom, D. G.; Arroyave, R.; Liu, Zi-kui; Lee, Minhyea; Ong, N. P.

Materials Research Society Symposium Proceedings. 2006. p. 65-74 (Materials Research Society Symposium Proceedings; Vol. 886).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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T1 - Thermoelectric properties of epitaxial and topotaxial Na xCoO 2 thin films

AU - Venimadhav, A.

AU - Ma, Z.

AU - Li, Qi

AU - Soukiassian, A.

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AU - Schlom, D. G.

AU - Arroyave, R.

AU - Liu, Zi-kui

AU - Lee, Minhyea

AU - Ong, N. P.

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N2 - We report structural, electrical, and thermopower properties of epitaxial and topotaxial Na xCoO 2 thin films on (0001) sapphire substrate. Topotaxial Na xCoO 2 films were prepared by converting an epitaxial Co 3O 4 film to Na xCoO 2 by annealing in Na vapor and epitaxial Na xCoO 2 films were obtained by pulsed laser deposition. All the films are c-axis oriented. For topotaxial films, annealing in different Na vapor pressures resulted in films with different Na concentrations, which showed distinct transport properties. For directly deposited epitaxial films by pulsed laser deposition, deposition parameters are found to control the Na concentration and hence the film properties. The largest thermoelectric power of the samples made by different methods is found to be similar in the range of 70-100 μV/K at room temperature.

AB - We report structural, electrical, and thermopower properties of epitaxial and topotaxial Na xCoO 2 thin films on (0001) sapphire substrate. Topotaxial Na xCoO 2 films were prepared by converting an epitaxial Co 3O 4 film to Na xCoO 2 by annealing in Na vapor and epitaxial Na xCoO 2 films were obtained by pulsed laser deposition. All the films are c-axis oriented. For topotaxial films, annealing in different Na vapor pressures resulted in films with different Na concentrations, which showed distinct transport properties. For directly deposited epitaxial films by pulsed laser deposition, deposition parameters are found to control the Na concentration and hence the film properties. The largest thermoelectric power of the samples made by different methods is found to be similar in the range of 70-100 μV/K at room temperature.

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Venimadhav A, Ma Z, Li Q, Soukiassian A, Xi XX, Schlom DG et al. Thermoelectric properties of epitaxial and topotaxial Na xCoO 2 thin films. In Materials Research Society Symposium Proceedings. 2006. p. 65-74. (Materials Research Society Symposium Proceedings).