Mazumder, S. ; Rajagopal, H. ; Sequeira, A. ; Venkatramani, R. ; Garg, S. P. ; Rajarajan, A. K. ; Gupta, L. C. ; Vijayaraghavan, R. (1988) A study of structural and electrical properties of YBa2-xLaxCu3O7+δ Journal of Physics C: Solid State Physics, 21 (35). pp. 5967-5976. ISSN 0022-3719
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Official URL: http://iopscience.iop.org/0022-3719/21/35/017
Related URL: http://dx.doi.org/10.1088/0022-3719/21/35/017
Abstract
The structural and superconducting properties of the 1:2:3 system YBa2-xLaxCu3O7+ delta (0<or=x<or=0.6) have been investigated employing X-ray and neutron powder diffraction, thermogravimetric analysis and resistivity measurements. It has been observed that the structure undergoes a transition from orthorhombic to tetragonal symmetry at x=0.3, with normal state (T>Tc=81 K) conductivity remaining metallic, while semiconductivity is exhibited for x>or=0.35. The neutron profile analysis shows that La goes into the Ba sites, as expected, with an indication of a small but significant fraction of vacancies at the Y sites.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Institute of Physics Publishing. |
| ID Code: | 11324 |
| Deposited On: | 09 Nov 2010 03:34 |
| Last Modified: | 02 Jun 2011 06:22 |
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