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Title: High field magnetoresistivity of epitaxial La2-xSrxCuO4 thin films
Authors: Vanacken, J
Weckhuysen, L
Wambecq, T
Moshchalkov, VV
WAGNER, Patrick
Issue Date: 2005
Abstract: A large positive magnetoresistivity (up to tens of percents) is observed in both underdoped and overdoped superconducting La2-xSrxCuO4 epitaxial thin films at temperatures far above the superconducting critical temperature T-c. For the underdoped samples, this magnetoresistance cannot be described by the Kohler rule and we believe it is to be attributed to the influence of superconducting fluctuations. In the underdoped samples (0.05 <= x <= 0.15), the large magnetoresistance is only present when at low temperatures superconductivity occurs. The strong magnetoresistivity, which persists even at temperatures substantially above T-c, can be related to the pairs forming eventually the superconducting state below T-c. Our observations support the idea of a close relation between the pseudogap and the superconducting gap and provide new indications for the presence of pairs above T-c. (c) 2005 Elsevier B.V. All rights reserved.
Notes: Katholieke Univ Leuven, Dept Chem, Vaste Stof Fys & Magnetisme Lab, B-3001 Louvain, Belgium. Lab Natl Champs Magnet Pulses, F-31432 Toulouse, France. Limburgs Univ Ctr, Inst Materiaalonderzoek, B-3590 Diepenbeek, Belgium.Vanacken, J, Katholieke Univ Leuven, Dept Chem, Vaste Stof Fys & Magnetisme Lab, Celestijnenlaan 200 D, B-3001 Louvain, Belgium.johan.vanacken@fys.kuleuven.be
URI: http://hdl.handle.net/1942/2140
DOI: 10.1016/j.physc.2005.07.015
ISI #: 000233801800011
ISSN: 0921-4534
Category: A1
Type: Journal Contribution
Validation: ecoom, 2006
Appears in Collections: Research publications

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