Preparation and superconducting properties of ultrathin YBa 2Cu3O7-x films

X. X. Xi; J. Geerk; G. Linker; Q. Li; O. Meyer

doi:10.1063/1.101530

Preparation and superconducting properties of ultrathin YBa ₂Cu₃O_7-x films

X. X. Xi, J. Geerk, G. Linker, Q. Li, O. Meyer

Physics

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97 Scopus citations

Abstract

Ultrathin films of YBa₂Cu₃O_7-x with thicknesses down to 2 nm were grown on(100)SrTiO₃ and (100)MgO by inverted cylindrical magnetron sputtering. Metallic behavior and zero resistance temperatures above 4.2 K were obtained in 3-nm-thick films on SrTiO _3. Thinner films revealed temperature-activated conductivity and only partial transitions to superconductivity due to inhomogeneities in the film morphology. On MgO, the critical film thickness leading to deteriorations of the transport properties was 6 nm. An analysis of the fluctuation-enhanced conductivity near T_c in terms of the Aslamazov-Larkin theory [Phys. Lett. A 26, 238 (1968)] revealed three-dimensional behavior even in the thinnest fully superconducting films.

Original language	English (US)
Pages (from-to)	2367-2369
Number of pages	3
Journal	Applied Physics Letters
Volume	54
Issue number	23
DOIs	https://doi.org/10.1063/1.101530
State	Published - 1989

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.101530

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title = "Preparation and superconducting properties of ultrathin YBa 2Cu3O7-x films",

abstract = "Ultrathin films of YBa2Cu3O7-x with thicknesses down to 2 nm were grown on(100)SrTiO3 and (100)MgO by inverted cylindrical magnetron sputtering. Metallic behavior and zero resistance temperatures above 4.2 K were obtained in 3-nm-thick films on SrTiO 3. Thinner films revealed temperature-activated conductivity and only partial transitions to superconductivity due to inhomogeneities in the film morphology. On MgO, the critical film thickness leading to deteriorations of the transport properties was 6 nm. An analysis of the fluctuation-enhanced conductivity near Tc in terms of the Aslamazov-Larkin theory [Phys. Lett. A 26, 238 (1968)] revealed three-dimensional behavior even in the thinnest fully superconducting films.",

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T1 - Preparation and superconducting properties of ultrathin YBa 2Cu3O7-x films

AU - Xi, X. X.

AU - Geerk, J.

AU - Linker, G.

AU - Li, Q.

AU - Meyer, O.

PY - 1989

Y1 - 1989

N2 - Ultrathin films of YBa2Cu3O7-x with thicknesses down to 2 nm were grown on(100)SrTiO3 and (100)MgO by inverted cylindrical magnetron sputtering. Metallic behavior and zero resistance temperatures above 4.2 K were obtained in 3-nm-thick films on SrTiO 3. Thinner films revealed temperature-activated conductivity and only partial transitions to superconductivity due to inhomogeneities in the film morphology. On MgO, the critical film thickness leading to deteriorations of the transport properties was 6 nm. An analysis of the fluctuation-enhanced conductivity near Tc in terms of the Aslamazov-Larkin theory [Phys. Lett. A 26, 238 (1968)] revealed three-dimensional behavior even in the thinnest fully superconducting films.

AB - Ultrathin films of YBa2Cu3O7-x with thicknesses down to 2 nm were grown on(100)SrTiO3 and (100)MgO by inverted cylindrical magnetron sputtering. Metallic behavior and zero resistance temperatures above 4.2 K were obtained in 3-nm-thick films on SrTiO 3. Thinner films revealed temperature-activated conductivity and only partial transitions to superconductivity due to inhomogeneities in the film morphology. On MgO, the critical film thickness leading to deteriorations of the transport properties was 6 nm. An analysis of the fluctuation-enhanced conductivity near Tc in terms of the Aslamazov-Larkin theory [Phys. Lett. A 26, 238 (1968)] revealed three-dimensional behavior even in the thinnest fully superconducting films.

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Preparation and superconducting properties of ultrathin YBa ₂Cu₃O_7-x films

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