Varma, K. B. R. ; Rao, K. J. ; Rao, C. N. R. (1989) Novel features of rapidly quenched melts of Bi2(Ca,Sr)3Cu2O8+δ Applied Physics Letters, 54 (1). pp. 69-71. ISSN 0003-6951
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Official URL: http://apl.aip.org/resource/1/applab/v54/i1/p69_s1
Related URL: http://dx.doi.org/10.1063/1.101436
Abstract
By roller quenching and water quenching melts of Bi2(Ca,Sr)3Cu2O8+δ, glasses have been obtained. These glasses exhibit two glass transitions as well as two crystallization transitions. Microwave absorption studies show the glass to be weakly superconducting at 77 K, probably due to the presence of ultramicrocrystallites. The glass on crystallization at 870 K gives the crystalline n=1 member of the homologous series Bi2(Ca,Sr)n+1CunO2n+4 and the n=2 member on annealing at 1100 K. The glass route provides a unique means of obtaining the n=2 member of the series. On prolonged annealing of the glass at 1120 K, the n=3 member seems to be formed.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Institute of Physics. |
| Keywords: | High-Tc Superconductors; Quenching; Fabrication; Superconductivity; Experimental Data; High Temperature; Very High Temperature; Annealing; Crystallization; Microwave Radiation; Absorptivity; Superconductors; Low Temperature; Very Low Temperature; Amorphous State; Crystal-phase Transformations; Bismuth Oxides; Copper Oxides; Calcium Oxides; Strontium Oxides |
| ID Code: | 43456 |
| Deposited On: | 11 Jun 2011 13:21 |
| Last Modified: | 03 Jul 2012 04:28 |
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