Singh, K. K. ; Kirtikar, V. ; Sinha, A. P. B. ; Morris, D. E. (1994) HgSr2CuO4+δ : a new 78 K superconductor by Mo substitution Physica C: Superconductivity, 231 (1-2). pp. 9-14. ISSN 0921-4534
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Official URL: http://www.sciencedirect.com/science/article/pii/0...
Related URL: http://dx.doi.org/10.1016/0921-4534(94)90137-6
Abstract
A new series of strontium-based (Hg, Mo)-1201 superconducting compounds has been synthesized. The highest Tc of the series (78 K) is found for the nominal composition (Hg0.85Mo0.15)Sr2CuO4+δ , with lattice constants: a=3.787 Å and c=8.844 Å . X-ray diffraction and SEM with EDX analysis confirm that Hg and Mo are indeed incorporated in the structure. High-pressure oxygenation at 250 bar and 325° C, and also at 1 bar, reduces the Tc indicating that the samples are overdoped. The a-axis increases and c-axis decreases with increasing Mo concentration, suggesting that Mo substitutes in the Hg-O layer rather than in the CuO2 layer.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 48914 |
| Deposited On: | 19 Jul 2011 07:27 |
| Last Modified: | 19 Jul 2011 07:27 |
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