Hostname: page-component-78c5997874-m6dg7 Total loading time: 0 Render date: 2024-11-03T05:13:20.156Z Has data issue: false hasContentIssue false
  • English
  • Français

Copper Valence Via Small Polaron Analysis in Sinter-Forged YBa2Cu3O7-y at 700°C

Published online by Cambridge University Press:  28 February 2011

Deepak Ahuja ,
S. E. Dorris ,
M.-Y. Su ,
Q. Robinson ,
D. L. Johnson  and
T. O. Mason
Deepak Ahuja
Affiliation:
Northwestern University, Dept. of Materials Science and Engineering and Materials Research Center, The Technological Institute, Evanston, IL 60208
S. E. Dorris
Affiliation:
Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439
M.-Y. Su
Affiliation:
Northwestern University, Dept. of Materials Science and Engineering and Materials Research Center, The Technological Institute, Evanston, IL 60208
Q. Robinson
Affiliation:
Northwestern University, Dept. of Materials Science and Engineering and Materials Research Center, The Technological Institute, Evanston, IL 60208
D. L. Johnson
Affiliation:
Northwestern University, Dept. of Materials Science and Engineering and Materials Research Center, The Technological Institute, Evanston, IL 60208
T. O. Mason
Affiliation:
Northwestern University, Dept. of Materials Science and Engineering and Materials Research Center, The Technological Institute, Evanston, IL 60208
Get access

Abstract

Via electrical property measurements (conductivity, thermopower) at 700°C on sinter-forged YBa Cu O, it was YBa2Cu3O7−x, it was determined that conduction occurs via small polaron conduction in the tetragonal phase. From the thermopower and oxygen content the distribution of copper valence states was determined.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 99: Symposium AA – High-Temperature Superconductors , 1987 , 467
Copyright
Copyright © Materials Research Society 1988

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

1. Robinson, Q., Georgopoulos, P., Johnson, D.L., Marcy, H.O., Kannewurf, C.R., Hwu, S.-J., Marks, T.J., Poeppelmeier, K.R., Song, S.N., and Ketterson, J.B., Adv. Ceram. Mater. 2 (3B), 380 (1987).Google Scholar
2. Cooper, J.R., Alavi, B., Zhou, L.-W., Beyermann, W.P., and Gruner, G., Phys. Rev. B35 (16), 8794 (1987).Google Scholar
3. Chaikin, P.M. and Beni, G., Phys. Rev. B13, 647 (1976).Google Scholar
4. Heikes, R., in Buhl International Conference on Materials. edited by Shatz, E.R., (Gordon and Breach, New York, 1979).Google Scholar
5. Trestman-Matts, A., Dorris, S.E., and Mason, T.O., J. Am. Ceram. Soc. 66 (8), 589 (1983).Google Scholar
6. Sykora, G.P. and Mason, T.O., Mat. Res. Soc. Symp. Proc. 60, 243 (1986).Google Scholar
7. Sageev-Grader, G., Gallagher, P.K., and Gyorgy, E.M., Appl. Phys. Lett. 51 (14), 1115 (1987).Google Scholar
8. Gallagher, P.K., Adv. Ceram. Mater. 2 (3B), 632 (1987).Google Scholar
9. Chen, H.-C., Gartstein, E., and Mason, T.O., J. Phys. Chem. Solids 43 (10), 991 (1982).Google Scholar
10. Petot-Ervas, G., Ochin, P., and Mason, T.O., in Proc. 3rd Inti. Conf. Transport in Nonstoichoimetrie Compounds. NATO Adv. Studies Institute. Series B; Physics, edited by Simkovich, G. and Stubican, V.S., (Plenum Press, New York, 1985) p. 61.Google Scholar
11. Karim, D.P. and Aldred, A.T., Phys. Rev. B20. 2255 (1979).Google Scholar
12. Dorris, S.E. and Mason, T.O., J. Am. Ceram. Soc, in press.Google Scholar