Hostname: page-component-8448b6f56d-42gr6 Total loading time: 0 Render date: 2024-04-19T23:56:46.483Z Has data issue: false hasContentIssue false
  • English
  • Français

Thermoelectric Properties of Magnetically c-axis Aligned Poly crystals in (Ca2ComOm+2δ)∼0.62Co02 (m=2 and 2) Systems

Published online by Cambridge University Press:  11 February 2011

S. Horii ,
I. Matsubara ,
M. Sano ,
R. Funahashi ,
M. Shikano ,
J. Shimoyama  and
K. Kishio
S. Horii
Affiliation:
Department of Superconductivity, University of Tokyo, Tokyo 113–8656, Japan
I. Matsubara
Affiliation:
National Institute of Advanced Industrial Science and Technology, Nagoya 463–8560, Japan
M. Sano
Affiliation:
Department of Superconductivity, University of Tokyo, Tokyo 113–8656, Japan
R. Funahashi
Affiliation:
National Institute of Advanced Industrial Science and Technology, Osaka 563–8577, Japan
M. Shikano
Affiliation:
National Institute of Advanced Industrial Science and Technology, Osaka 563–8577, Japan
J. Shimoyama
Affiliation:
Department of Superconductivity, University of Tokyo, Tokyo 113–8656, Japan PREST/JST, Japan
K. Kishio
Affiliation:
Department of Superconductivity, University of Tokyo, Tokyo 113–8656, Japan
Get access

Abstract

We report preparation and thermoelectric properties of c-axis aligned and densified Ca3Co4O9 and [Ca2(Co0.65Cu0.35)2O4]0.624CoO2 polycrystals. The c-axis alignment and densification were accomplished by magnetic alignment and spark plasma sintering methods, respectively. The obtained samples showed high degrees of c-axis orientation and relative densities, which were close to those of single crystals, resulting in the highest values of power factors in Ca3Co4O9 and [Ca2(Co0.65Cu0.35)2O4]0.624CoO2 polycrystals.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 755: Symposium DD – Solid-State Chemistry of Inorganic Materials IV , 2002 , DD11.30
Copyright
Copyright © Materials Research Society 2003

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

REFERENCES

Terasaki, I., Sasago, Y. and Uchinokura, K., Phys. Rev. B 56 (1997) R12685.Google Scholar
Ito, T., Kawata, T., Kitajima, T. and Terasaki, I., Proc. 17th Int. Conf. Thermoelectrics (ICT '98) (IEEE, Piscataway, 1999) p. 595.Google Scholar
Shi, W. and Murayama, N., J. Mater. Res. 15 (2000) 382.Google Scholar
Miyazaki, Y., Kudo, K., Akoshima, M., Ono, Y., Koike, Y., and Kajitani, T., Jpn. J. Appl. Phys. 39 (2000) L531.Google Scholar
5. Masset, A.C., Michel, C., Maignan, A., Hervieu, M., Toulemonde, O., Studer, F., and Raveau, B., Phys. Rev. B 62 (2000) 166.Google Scholar
6. Funahashi, R., Matsubara, I., Ikuta, H., Takeuchi, T., Mizutani, U. and Sodeoka, S., Jpn. J. Appl. Phys. 39 (2000) L1127.Google Scholar
7. Miyazaki, Y., Onoda, M., Oku, T., Kikuchi, M., Ishii, Y., Ono, Y., Morii, Y., and Kajitani, T., J. Phys. Soc. Jpn. 71 (2002) 491.Google Scholar
8. Miyazaki, Y., Miura, T., Ono, Y., and Kajitani, T., Jpn. J. Appl. Phys. 41 (2002) L849.Google Scholar
9. Matsubara, I., Funahashi, R., Takeuchi, T., and Zhou, Y., Proc. 20th Int. Conf. Thermoelectrics (ICT 2001) (Beijing 2001) (unpublished)Google Scholar
10. Li, S., Funahashi, R., Matsubara, I., Ueno, K., Sodeoka, S., and Yamada, H., Chem. Mater. 12 (2000) 2424.Google Scholar
11. Suzuki, et al. (unpublished)Google Scholar
12. Matsubara, I., Funahashi, R., Takeuchi, T., and Sodeoka, S., J. Appl. Phys. 90 (2001) 462.Google Scholar
13. Sano, et al. (unpublished)Google Scholar
14. Horii, et al. (unpublished)Google Scholar
15. Terasaki, I., Ishii, Y., Tanaka, D., Takahata, K. and Iguchi, Y., Jpn. J. Appl. Phys. 40 (2001) L65.Google Scholar