Morris, D. E. ; Narwankar, P. K. ; Sinha, A. P. B. ; Takano, K. ; Shum, V. T. (2009) Lanthanum-substituted Y-Ba-Cu-O superconductors synthesized at elevated oxygen pressures Applied Physics Letters, 57 (7). 715_1-715_3. ISSN 0003-6951
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Official URL: http://apl.aip.org/resource/1/applab/v57/i7/p715_s...
Related URL: http://dx.doi.org/10.1063/1.104257
Abstract
Lanthanum substitution in the Y-Ba-Cu-O system at elevated P(O2) results in superconducting compositions which throw interesting light on the effects of nonisovalent substitution in a Y-Ba-Cu-O system. Like Ca substitution, La substitution also shifts the phase formation boundary between 123, 247, and 124 phases to higher P(O2), and stabilizes a tetragonal 123 structure at moderately elevated P(O2). However, in contrast with Ca substitution, Tc decreases continuously and rapidly with increasing La content. This can be only partly explained by a decrease of the hole concentration.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Institute of Physics. |
| Keywords: | Phase Boundaries; High-Tc Superconductors; Yttrium Oxides; Barium Oxides; Copper Oxides; Lawrence Berkeley Laboratory; Lanthanum Oxides; Superconductivity; Crystal Structure; Transition Temperature; Carrier Density; Synthesis |
| ID Code: | 48943 |
| Deposited On: | 12 Oct 2011 12:03 |
| Last Modified: | 12 Oct 2011 12:03 |
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