Hostname: page-component-cd9895bd7-gbm5v Total loading time: 0 Render date: 2024-12-23T19:05:23.905Z Has data issue: false hasContentIssue false
  • English
  • Français

X-ray powder diffraction data of layered cobaltites with the compositions Ca3−xSrxCo4O9

Published online by Cambridge University Press:  05 March 2012

Sejin Yoon ,
O-Jong Kwon ,
Myung-Jin Jung ,
Jaeun Yoo ,
Chan Park  and
Keun Hwa Chae
Sejin Yoon
Affiliation:
Department of Materials Science and Engineering, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea
O-Jong Kwon
Affiliation:
Department of Materials Science and Engineering, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea
Myung-Jin Jung
Affiliation:
Department of Materials Science and Engineering, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea
Jaeun Yoo
Affiliation:
Department of Materials Science and Engineering, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea
Chan Park*
Affiliation:
Department of Materials Science and Engineering, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea and Research Institute of Advanced Materials, Seoul National University, Seoul 151-744, Korea
Keun Hwa Chae
Affiliation:
Nano Analysis Center, Korea Institute of Science and Technology, Seoul 136-791, Korea
*
a)Author to whom correspondence should be addressed. Electronic mail: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

Ca3−xSrxCo4O9 with different compositions (x=0, 0.15, 0.3, and 0.45) were synthesized from stoichiometric mixtures of Co3O4, CaCO3, and SrCO3, and their unit-cell parameters were determined. The powders were mixed with silicon standard powder, and XRD patterns were collected and analyzed using TOPAS. The compounds were determined to be monoclinic with space group of P2. Unit-cell parameters changed from a=4.8329(3) Å, b=4.5727(1) Å, c=10.8360(4) Å, and β=98.093(7)° when x=0, to a=4.8432(1) Å, b=4.6100(3) Å, c=10.8668(3) Å, and β=98.110(5)° when x=0.3. An unidentified second phase was observed when x=0.45.

Keywords

X-ray diffractionthermoelectric compoundlayered cobaltite
Type
New Diffraction Data
Information
Powder Diffraction , Volume 26 , Issue 3 , September 2011 , pp. 273 - 276
Copyright
Copyright © Cambridge University Press 2011

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Fujita, K., Mochida, T., and Nakamura, K. (2001). “High-temperature thermoelectric properties of NaxCoO2-δ single crystals,” Jpn. J. Appl. Phys. 40, 4644–4647. 10.1143/JJAP.40.4644CrossRefGoogle Scholar
Hicks, L. D., and Dresselhaus, M. S. (1993). “Effect of quantum-well structures on the thermoelectric figure of merit,” Phys. Rev. B 47, 727–731. 10.1103/PhysRevB.47.727CrossRefGoogle ScholarPubMed
Li, S., Funahashi, R., Matsubara, I., Ueno, K., Sodeoka, S., and Yamada, H. (2000). “Synthesis and thermoelectric properties of the new oxide materials Ca3-xBixCo4O9+δ (0.0 < x < 0.75),” Chem. Mater. 12, 2424–2427. 10.1021/cm000132rCrossRefGoogle Scholar
Masset, A. C., Michel, C., Maignan, A., Hervieu, M., Toulemonde, O., Studer, F., Raveau, B., and Hejtmanek, J. (2000). “Misfit-layered cobaltite with an anisotropic giant magnetoresistance: Ca3Co4O9,” Phys. Rev. B 62, 166–175. 10.1103/PhysRevB.62.166CrossRefGoogle Scholar
Matsubara, I., Funahashi, R., Takeuchi, T., and Sodeoka, S. (2001). “Thermoelectric properties of spark plasma sintered Ca2.75Gd0.25Co4O9 ceramics,” J. Appl. Phys. 90, 462–465. 10.1063/1.1378056CrossRefGoogle Scholar
Matsubara, I., Funahashi, R., Shikano, M., Sasaki, K. and Enomoto, H. (2002). “Cation substituted (Ca2CoO3)xCoO2 films and their thermoelectric properties,” Appl. Phys. Lett. 80, 4729–4731. 10.1063/1.1489706CrossRefGoogle Scholar
Shikano, M. and Funahashi, R. (2003). “Electrical and thermal properties of single-crystalline (Ca2CoO3)0.7CoO2 with a Ca3Co4O9 structure,” Appl. Phys. Lett. 82, 1851–1853. 10.1063/1.1562337CrossRefGoogle Scholar
Smith, G. S., and Snyder, R. L. (1979). “F N: A criterion for rating powder diffraction patterns and evaluating the reliability of powder-pattern indexing,” J. Appl. Crystallogr. 12, 60–65. 10.1107/S002188987901178XCrossRefGoogle Scholar
Terasaki, I., Sasago, Y., and Uchinokura, K. (1997). “Large thermoelectric power in NaCo2O4 single crystals,” Phys. Rev. B 56, 685–687. 10.1103/PhysRevB.56.R12685CrossRefGoogle Scholar
Wang, L. B., Maignan, A., Pelloquin, D., Hébert, S., and Raveau, B. (2002). “Transport and magnetic properties of Ca3-xSrxCo4O9,” J. Appl. Phys. 92, 124–128. 10.1063/1.1482428CrossRefGoogle Scholar
Xu, G., Funahashi, R., Shikano, M., Matsubara, I., and Zhou, Y. (2002). “Thermoelectric properties of the Bi- and Na-substituted Ca3Co4O9 system,” Appl. Phys. Lett. 80, 3760–3762. 10.1063/1.1480115CrossRefGoogle Scholar