ISSN:
1432-0630
Keywords:
PACS: 74.60.Jg; 74.72.Bk; 74.76.Bz
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract. YBCO thin films and buffer layers are deposited by a special PLD setup with an 8-cm line focus on cylindrical targets and substrate scanning perpendicular to it. Different kinds of substrates (SrTiO3, MgO, LaAlO3, Y-ZrO2and sapphire) as large as 7×20 cm2 were coated with YBCO. Two important aspects of the presented PLD setup will be discussed in detail: the method of substrate heating and the variation of the angle between the incident laser beam and the target surface (“wobbling”). The surface of the target material has been investigated by SEM. The influence of target “wobbling” on the time stability of the plasma will be discussed. The homogeneity of the deposited YBCO films with respect to structural and electrical properties has been investigated by XRD, RBS/channeling, and spatially resolved inductive measurements of Tc and jc. The values of jc on 7×20 cm2in situ buffered sapphire substrates are 2.0 MA/cm2 at (77 K, 0 T) with a jc variation of less than ±20%.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s003390051429
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