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J Phys Condens Matter. 2009 Jun 24;21(25):254205. doi: 10.1088/0953-8984/21/25/254205. Epub 2009 May 29.

Structural, electrical and magnetic characterization of artificial ferromagnetic/superconducting (La(0.7)Ca(0.3)MnO(3)/YBa(2)Cu(3)O(7-x)) heterostructures.

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1
Physics Department 'E R Caianiello', University of Salerno, Via S. Allende, 84081 Baronissi (SA), Italy. Laboratorio Regionale SUPERMAT, CNR-INFM, Via S. Allende, 84081 Baronissi (SA), Italy. School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, UK.

Abstract

The fabrication and characterization of superconducting and ferromagnetic heterostructures is an open field due to the fundamental interest in the physics of the coexistence of these two competing orders and their possible applications in the spintronics industry. In this paper we present structural, electrical and magnetic characterization for the single La(0.7)Ca(0.3)MnO(3) (LCMO) thin layer, La(0.7)Ca(0.3)MnO(3)/YBa(2)Cu(3)O(7-x) (LCMO/YBCO) bilayers and the LCMO/YBCO/LCMO trilayers. In particular, we show a detailed magnetic characterization of the LCMO thin films by means of low temperature magnetic force microscopy. We discuss the different dynamics of the magnetic domains observed, depending on the substrate induced strain and on the film thickness.

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