Publication: Ferromagnetic/superconducting proximity effect in La_(0.7)Ca_(0.3)MnO_(3)/YBa_(2)Cu_(3)O_(7-δ) superlattices
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Publication Date
2003-06-13
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American Physical Society
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Abstract
We study the interplay between magnetism and superconductivity in high-quality YBa_(2)Cu_(3)O_(7)(YBCO)/La_(0.7)Ca_(0.3)MnO_(3)(LCMO) superlattices. We find evidence for the YBCO superconductivity depression in the presence of the LCMO layers. We show that due to its short coherence length, superconductivity survives in the YBCO down to a much smaller thickness in the presence of the magnetic layer than in low Tc superconductors. We also find that for a fixed thickness of the superconducting layer, superconductivity is depressed over a thickness interval of the magnetic layer in the 100 nm range. This is a much longer length scale than that predicted by the theory of ferromagnetic/superconducting proximity effect.
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© 2003 The American Physical Society. Work was supported by Contract No. CICYT MAT2000- 1468, No. CAM 07N/0008/2001 and Fundación Ramón Areces. We thank R. Escudero, J. Fontcuberta, J. M. de Teresa, C. Sa de Melo, I. K. Schuller, J. L. Vicent, and V. Vlasko-Vlasov for useful conversations.
UCM subjects
Electricidad, Electrónica (Física), Física de materiales, Física del estado sólido
Unesco subjects
2202.03 Electricidad, 2211 Física del Estado Sólido
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