Journal
APPLIED PHYSICS EXPRESS
Volume 2, Issue 9, Pages -Publisher
JAPAN SOC APPLIED PHYSICS
DOI: 10.1143/APEX.2.091403
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- Elements Science and Technology Project
- Ministry of Education, Culture, Sports, Science and Technology, Japan
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We have found that epitaxial MgO(111) thin films grow under a wide range of deposition conditions (substrate temperatures of 400-800 degrees C, oxygen partial pressures of 10(-4)-10(0) Pa) on alpha-Al2O3(0001) substrates by pulsed laser deposition (PLD), despite the strongly divergent electrostatic potential of MgO(111). The surfaces of the resulting thin films show step-and-terrace structures reflecting the surface of alpha-Al2O3(0001) with a small root-mean-square roughness of 0.62 nm even at a film thickness of 80 nm. These results present the possibility of fabricating various artificial oxide structures using flat MgO(111) films produced by a conventional PLD technique. (C) 2009 The Japan Society of Applied Physics
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