Hostname: page-component-84b7d79bbc-g78kv Total loading time: 0 Render date: 2024-07-25T05:51:34.265Z Has data issue: false hasContentIssue false
  • English
  • Français

Electrical Conductivity and Thermogravimetric Studies of the High-7c Superconductor YBa2Cu3Ox

Published online by Cambridge University Press:  28 February 2011

Y. H. Han  and
D. W. Monroe
Y. H. Han
Affiliation:
AT&T Engineering Research Center, PO BOX 900, Princeton, NJ 08540.
D. W. Monroe
Affiliation:
AT&T Engineering Research Center, PO BOX 900, Princeton, NJ 08540.
Get access

Abstract

Nonstoichiometry in YBa2Cu3Ox has been studied by means of equilibrium electrical conductivity and thermogravimetric method. We have observed a strong correlation between electrical resistivity and oxygen stoichiometry (x) at high temperature. Electrical resistivities increase linearly from the superconducting onset tcmperature(100 K) to 450 C where oxygen starts to evolve from this material, and then begin to deviate from linear temperature dependence. The experimental results indicate that electrical resistivity in this material is associated with the defect species (charge carrier) population due to oxygen stoichiometry. Electrical conductivities were also measured as a function of oxygen partial pressure (1 to 10−4 atm) at various temperatures. At P(OI) > 101 atm the conductivity shows a l/4th slope dependence on oxygen partial pressure while at P(0;) < 10 f atm the conductivity is proportional to P(O2)1/2- The conductivity behavior with oxygen stoichiometry suggests that the electron holes associated with Cu+ play an important role as charge carriers in this material, and even at x < 6.5 p-typc conduction is predominant.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 99: Symposium AA – High-Temperature Superconductors , 1987 , 753
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] Cava, R.J., Batlogg, B., vanDovcr, R.B., Murphy, D.W., Sunshine, S., Sicgricst, T., Rcmeika, J.P., Rietman, E.A., Zahurak, S. and Espinosa, G.P., Phys. Rev. Lett., Vol 58, No 16, 1676–1679 (1987)Google Scholar
[2] Strobel, P., Caponi, J.J., Chaillout, C., Marezio, M. and Tholence, J.L., Nature, 327, 306–308 (1987)Google Scholar
[3] Tarascón, J.M., McKinnon, W.R., Greene, L.H., Hull, G.W., Bagley, B.G., Vogel, E.M. and LePage, Y., Extended Abstract of High Temperature Superconductors, MRS meeting, Anheim Anaheim, April, (1987)Google Scholar
[4] Gallagher, P.K., O'Bryan, H.M., Sunshine, S.A. and Murphy, D.W., Mat. Res. Bull., Vol. 22, 995–1006, (1987)Google Scholar
[5] Rao, C.N.R., Ganguly, P., Sreedhar, K., Mohan Ram, R.A. and Sarode, P.R., Mat. Res. Bull. Vol. 22, 849–855 (1987)Google Scholar
[6] Murphy, D.W. et al., Proceeding of the Am. Chem. Soc. (1987)Google Scholar
[7] David, W.I.F. et al, Nature, 327, 310–312 (1987)Google Scholar
[8] Gallagher, P.K., Advanced Ceramic Materials Vol. 2, p 632 (1987)Google Scholar
[9] O'Bryan, H.M. and Gallagher, P.K., Advanced Ceramic Materials Vol. 2, p 640 (1987)Google Scholar
[10] Extended Abstracts of High Temperature Superconductors, MRS Spring Meeting Anaheim, April 1987 Google Scholar
[11] Mawdsley, A., Trodahl, H.J., Talion, J., Safati, J. and Kaiser, A.B., Nature, Vol. 328, 233–234 (1987)Google Scholar
[12] Wang, Z.Z., Clayhold, J., Ong, N.P., Tarascón, J.M., Greene, L.H., McKinnonan, W.R., Hull, G.W., Submitted to Physical Review B, July 1987.Google Scholar
[13] Krogcr, F.A. and Vink, K.J.; p 307 in Solid State Physics, Vol. 3. edited by Stitz, F. and Turnbull, D.. Academic Press, New York, 1956.Google Scholar
[14] Han, Y.H., Appleby, J.B. and Smyth, D.M., J. Am. Cer. Soc., Vol. 70, No 2, 96–100 (1987)Google Scholar