Oxygen desorption from high Tc YBa2Cu3O7−δ (δ = 0.05, 0.5)

Hegde, MS (1988) Oxygen desorption from high Tc YBa2Cu3O7−δ (δ = 0.05, 0.5). In: Materials Research Bulletin, 23 (8). pp. 1171-1176.

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Abstract

From a temperature programmed desorption study employing a quadrupole mass spectrometer, the superconducting oxide YBa2Cu3O7−δ (δ = 0.05) showed two distinct oxygen desorption peaks, one below and one above 470°C. The activation energy of oxygen desorption of the superconducting oxide was 28 Kcals/mole and that of non-superconducting oxide (YBa2Cu3O6.5) was 54 Kcals/mole. No impurity peaks due to H2O, CO and CO2 from the bulk or adsorbed on surfaces could be observed when a well prepared superconducting oxide was heated up to 650°C.

Item Type:	Journal Article
Publication:	Materials Research Bulletin
Publisher:	Elsevier
Additional Information:	Copy rights of this article belongs to Elsevier Science Ltd.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	04 Feb 2010 06:22
Last Modified:	19 Sep 2010 05:39
URI:	http://eprints.iisc.ac.in/id/eprint/21919

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