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Effect of Mg(OH)2 on YBa2Cu3O7 thin film on MgO substrate studied by atomic force microscope

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7 Author(s)
Kim, B.I. ; Department of Physics, Seoul National University, Seoul 151‐742, Korea ; Hong, J.W. ; Jeong, G.T. ; Moon, S.H.
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We observed the surface degradation of MgO single‐crystal substrates stored in humid air after cleavage by atomic force microscope. Annealing at 1000 °C in dry oxygen removed local defects though residual subgrain structure remains. The morphology of YBa2Cu3O7-δ (YBCO) films on the annealed and degraded substrates reflects these changes of the substrates. We confirmed that the annealing process of degraded substrate improves the film quality by measuring transition temperature Tc and critical current Jc of each film.

Published in:

Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures  (Volume:12 ,  Issue: 3 )

Date of Publication:

May 1994

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