FLUCTUATION CONDUCTIVITY OF YBACUO EPITAXIAL THIN-FILMS GROWN ON VARIOUS SUBSTRATES

PATAPIS, SK; JONES, EC; PHILLIPS, JM; NORTON, DP; LOWNDES, DH

dc.contributor.author	PATAPIS, SK	en
dc.contributor.author	JONES, EC	en
dc.contributor.author	PHILLIPS, JM	en
dc.contributor.author	NORTON, DP	en
dc.contributor.author	LOWNDES, DH	en
dc.date.accessioned	2014-03-01T01:43:51Z
dc.date.available	2014-03-01T01:43:51Z
dc.date.issued	1995	en
dc.identifier.issn	0921-4534	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/24230
dc.subject.classification	Physics, Applied	en
dc.subject.other	HIGH-TC SUPERCONDUCTORS	en
dc.subject.other	THERMODYNAMIC FLUCTUATIONS	en
dc.subject.other	INPLANE PARACONDUCTIVITY	en
dc.subject.other	FRACTAL BEHAVIOR	en
dc.subject.other	TEMPERATURE SUPERCONDUCTORS	en
dc.subject.other	CERAMIC SUPERCONDUCTORS	en
dc.subject.other	TRANSPORT-PROPERTIES	en
dc.subject.other	SINGLE-CRYSTAL	en
dc.subject.other	YBA2CU3O7-X	en
dc.subject.other	RESISTIVITY	en
dc.title	FLUCTUATION CONDUCTIVITY OF YBACUO EPITAXIAL THIN-FILMS GROWN ON VARIOUS SUBSTRATES	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1995	en
heal.abstract	The fluctuation conductivity, in zero applied magnetic field, is analyzed for different high-quality c oriented epitaxial thin films of Y1Ba2Cu3O7-x grown on various substrates; one ex-situ grown on single crystal LaAlO3 and one in-situ grown on crystalline KTaO3. and one in-situ grown on polycrystalline YSZ. From the temperature dependence of the thermal fluctuation behavior, critical exponents are extracted, without fitting parameters, and the fluctuation dimensionality is deduced, Our findings are explicitly consistent with the thin-film structure of the sample and the conductivity behavior model proposed by Maki and Thompson. The first two epitaxial films show 2D dimensionality with a weak Maki-Thompson pair-breaking mechanism above T-c, and a cross-over to a 3D dimensionality near T-c. Moreover, the insensitivity to different substrate-induced lattice strains suggests that lattice strains do not alter the fluctuation behavior. The findings suggest a percolative mechanism in the polycrystalline film.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	PHYSICA C	en
dc.identifier.isi	ISI:A1995QQ29300003	en
dc.identifier.volume	244	en
dc.identifier.issue	3-4	en
dc.identifier.spage	198	en
dc.identifier.epage	206	en