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Novel features of rapidly quenched melts of Bi2(Ca,Sr) 3Cu2O8+δ

Varma, KBR and Rao, KJ and Rao, CNR (1989) Novel features of rapidly quenched melts of Bi2(Ca,Sr) 3Cu2O8+δ. In: Applied Physics Letters, 54 (1). pp. 69-71.

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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+1CunO 2n+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: Journal Article
Publication: Applied Physics Letters
Publisher: American Institute of Physics
Additional Information: Copyright of this article belongs to American Institute of Physics.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 14 Jul 2010 10:51
Last Modified: 03 Jan 2013 04:43
URI: http://eprints.iisc.ac.in/id/eprint/29283

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