Analysis of the magneto-transport properties of superconducting/ferromagnetic YBa sub(2)Cu sub(3)O sub(7)/La sub(0.7)Sr sub(0.3)MnO sub(3) bilayer thin films

Y sub(1)Ba sub(2)Cu sub(3)O sub(7-) delta (100 nm)/La sub(0.7)Sr sub(0.3)MnO sub(3) (20 nm) double-layered films and La sub(0.7)Sr sub(0.3)MnO sub(3) (20 nm) single layer films were prepared on LaAlO sub(3) substrates by magnetron sputtering and their electrical and magnetic properties were examined...

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Bibliographic Details
Published in:Journal of alloys and compounds 2010-03, Vol.492 (1-2), p.8-12
Main Authors: Topal, Ugur, Birlikseven, Cengiz, Yakinci, MEyuephan, Nurgaliev, Timur
Format: Article
Language:English
Subjects:
Alloys
COPPER OXIDE
Ferromagnetic materials
MAGNETIC PROPERTIES
PROPERTIES
Recording
SUPERCONDUCTIVITY
SUPERCONDUCTORS
Texts
THIN FILMS
TRANSITION TEMPERATURE
YBCO superconductors
YTTRIUM OXIDE
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Summary:Y sub(1)Ba sub(2)Cu sub(3)O sub(7-) delta (100 nm)/La sub(0.7)Sr sub(0.3)MnO sub(3) (20 nm) double-layered films and La sub(0.7)Sr sub(0.3)MnO sub(3) (20 nm) single layer films were prepared on LaAlO sub(3) substrates by magnetron sputtering and their electrical and magnetic properties were examined. It was observed that the interactions between magnetic and superconducting layers lead to some peculiar electrical and magnetic properties such as a semiconducting-like behavior above superconducting transition temperature. Possible reasons of this behavior and others are discussed in the text. Additionally, it is observed that the SC/FM film has a quite low coercivity (50 Oe) and large M sub(r)/M sub(s) ratio (0.8) at 300 K. The extraordinary properties of these materials may give rise to their utilization of these films for temporary recording of information on magnetic surfaces.
ISSN:0925-8388
DOI:10.1016/j.jallcom.2009.11.075