Proximity effect in planar superconducting tunnel junctions containing Nb/NiCu superconductor/ferromagnet bilayers

G.P Pepe; R. Latempa; L. Parlato; A. Ruotolo; G. Ausanio; G. Peluso; A. Barone; Alexandre Avraamovitch Golubov; I.V. Fominov; Ya. V. Fominov; M. Yu Kupriyanov

doi:10.1103/PhysRevB.73.054506

Proximity effect in planar superconducting tunnel junctions containing Nb/NiCu superconductor/ferromagnet bilayers

G.P Pepe, R. Latempa, L. Parlato, A. Ruotolo, G. Ausanio, G. Peluso, A. Barone, Alexandre Avraamovitch Golubov, I.V. Fominov, Ya. V. Fominov, M. Yu Kupriyanov

Faculty of Science and Technology

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Abstract

We present experimental results concerning both the fabrication and characterization of superconducting tunnel junctions containing superconductor/ferromagnet (S/F) bilayers made by niobium (S) and a weak ferromagnetic Ni0.50Cu0.50 alloy. Josephson junctions have been characterized down to T=1.4 K in terms of current-voltage I-V characteristics and Josephson critical current versus magnetic field. By means of a numerical deconvolution of the I-V data the electronic density of states on both sides of the S/F bilayer has been evaluated at low temperatures. Results have been compared with theoretical predictions from a proximity model for S/F bilayers in the dirty limit in the framework of Usadel equations for the S and F layers, respectively. The main physical parameters characterizing the proximity effect in the Nb/NiCu bilayer, such as the coherence length and the exchange field energy of the F metal, and the S/F interface parameters have been also estimated.

Original language	Undefined
Pages (from-to)	054506-
Journal	Physical review B: Condensed matter and materials physics
Volume	73
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevB.73.054506
Publication status	Published - 2006

Keywords

IR-59098
METIS-233431

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10.1103/PhysRevB.73.054506

proximity

Cite this

Pepe, G. P., Latempa, R., Parlato, L., Ruotolo, A., Ausanio, G., Peluso, G., Barone, A., Golubov, A. A., Fominov, I. V., Fominov, Y. V., & Kupriyanov, M. Y. (2006). Proximity effect in planar superconducting tunnel junctions containing Nb/NiCu superconductor/ferromagnet bilayers. Physical review B: Condensed matter and materials physics, 73(5), 054506-. https://doi.org/10.1103/PhysRevB.73.054506

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title = "Proximity effect in planar superconducting tunnel junctions containing Nb/NiCu superconductor/ferromagnet bilayers",

abstract = "We present experimental results concerning both the fabrication and characterization of superconducting tunnel junctions containing superconductor/ferromagnet (S/F) bilayers made by niobium (S) and a weak ferromagnetic Ni0.50Cu0.50 alloy. Josephson junctions have been characterized down to T=1.4 K in terms of current-voltage I-V characteristics and Josephson critical current versus magnetic field. By means of a numerical deconvolution of the I-V data the electronic density of states on both sides of the S/F bilayer has been evaluated at low temperatures. Results have been compared with theoretical predictions from a proximity model for S/F bilayers in the dirty limit in the framework of Usadel equations for the S and F layers, respectively. The main physical parameters characterizing the proximity effect in the Nb/NiCu bilayer, such as the coherence length and the exchange field energy of the F metal, and the S/F interface parameters have been also estimated.",

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author = "G.P Pepe and R. Latempa and L. Parlato and A. Ruotolo and G. Ausanio and G. Peluso and A. Barone and Golubov, {Alexandre Avraamovitch} and I.V. Fominov and Fominov, {Ya. V.} and Kupriyanov, {M. Yu}",

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doi = "10.1103/PhysRevB.73.054506",

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journal = "Physical review B: Condensed matter and materials physics",

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Pepe, GP, Latempa, R, Parlato, L, Ruotolo, A, Ausanio, G, Peluso, G, Barone, A, Golubov, AA, Fominov, IV, Fominov, YV & Kupriyanov, MY 2006, 'Proximity effect in planar superconducting tunnel junctions containing Nb/NiCu superconductor/ferromagnet bilayers', Physical review B: Condensed matter and materials physics, vol. 73, no. 5, pp. 054506-. https://doi.org/10.1103/PhysRevB.73.054506

TY - JOUR

T1 - Proximity effect in planar superconducting tunnel junctions containing Nb/NiCu superconductor/ferromagnet bilayers

AU - Pepe, G.P

AU - Latempa, R.

AU - Parlato, L.

AU - Ruotolo, A.

AU - Ausanio, G.

AU - Peluso, G.

AU - Barone, A.

AU - Golubov, Alexandre Avraamovitch

AU - Fominov, I.V.

AU - Fominov, Ya. V.

AU - Kupriyanov, M. Yu

PY - 2006

Y1 - 2006

N2 - We present experimental results concerning both the fabrication and characterization of superconducting tunnel junctions containing superconductor/ferromagnet (S/F) bilayers made by niobium (S) and a weak ferromagnetic Ni0.50Cu0.50 alloy. Josephson junctions have been characterized down to T=1.4 K in terms of current-voltage I-V characteristics and Josephson critical current versus magnetic field. By means of a numerical deconvolution of the I-V data the electronic density of states on both sides of the S/F bilayer has been evaluated at low temperatures. Results have been compared with theoretical predictions from a proximity model for S/F bilayers in the dirty limit in the framework of Usadel equations for the S and F layers, respectively. The main physical parameters characterizing the proximity effect in the Nb/NiCu bilayer, such as the coherence length and the exchange field energy of the F metal, and the S/F interface parameters have been also estimated.

AB - We present experimental results concerning both the fabrication and characterization of superconducting tunnel junctions containing superconductor/ferromagnet (S/F) bilayers made by niobium (S) and a weak ferromagnetic Ni0.50Cu0.50 alloy. Josephson junctions have been characterized down to T=1.4 K in terms of current-voltage I-V characteristics and Josephson critical current versus magnetic field. By means of a numerical deconvolution of the I-V data the electronic density of states on both sides of the S/F bilayer has been evaluated at low temperatures. Results have been compared with theoretical predictions from a proximity model for S/F bilayers in the dirty limit in the framework of Usadel equations for the S and F layers, respectively. The main physical parameters characterizing the proximity effect in the Nb/NiCu bilayer, such as the coherence length and the exchange field energy of the F metal, and the S/F interface parameters have been also estimated.

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KW - METIS-233431

U2 - 10.1103/PhysRevB.73.054506

DO - 10.1103/PhysRevB.73.054506

M3 - Article

SN - 1098-0121

VL - 73

SP - 054506-

JO - Physical review B: Condensed matter and materials physics

JF - Physical review B: Condensed matter and materials physics

IS - 5

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