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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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|
|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|
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