Determination of the magnetic field penetration depth in YBa2Cu3O7 superconducting films by polarized neutron reflectometry

Valeria Lauter-Pasyuk; H. J. Lauter; V. L. Aksenov; E. I. Kornilov; A. V. Petrenko; P. Leiderer

doi:10.1016/S0921-4526(98)00226-9

Determination of the magnetic field penetration depth in YBa2Cu3O7 superconducting films by polarized neutron reflectometry

Valeria Lauter-Pasyuk, H. J. Lauter, V. L. Aksenov, E. I. Kornilov, A. V. Petrenko, P. Leiderer

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

Polarized neutron reflectometry was used for the direct measurement of the magnetic-field penetration depth in a high-temperature (HT_c) superconducting film. Two scattering geometries were used. The deduced neutron scattering length density profile gave an exact picture of the composition of the film. The fit to the spin-asymmetry yielded a magnetic-penetration depth of 1400 ± 100 Å at a temperature of T = 4.8 K along the c-axis oriented perpendicular to the film surface. The model included an intrinsic exponential decay of the penetration depth. For the first time the spin-asymmetry was determined with high resolution over an extended Q-range for a HT_c-film. Nb-films were investigated as reference.

Original language	English
Pages (from-to)	166-170
Number of pages	5
Journal	Physica B: Physics of Condensed Matter
Volume	248
Issue number	1-4
DOIs	https://doi.org/10.1016/S0921-4526(98)00226-9
State	Published - Jun 15 1998
Externally published	Yes

Funding

The present work was supported by the BMBF under contract Le03Kon and Le04Kon/Dubna and by the INTAS grant No. 93–3617.

Keywords

High-T superconducting films
Magnetic penetration depth
Nb films
Polarized neutron reflection

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10.1016/S0921-4526(98)00226-9

Cite this

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title = "Determination of the magnetic field penetration depth in YBa2Cu3O7 superconducting films by polarized neutron reflectometry",

abstract = "Polarized neutron reflectometry was used for the direct measurement of the magnetic-field penetration depth in a high-temperature (HTc) superconducting film. Two scattering geometries were used. The deduced neutron scattering length density profile gave an exact picture of the composition of the film. The fit to the spin-asymmetry yielded a magnetic-penetration depth of 1400 ± 100 {\AA} at a temperature of T = 4.8 K along the c-axis oriented perpendicular to the film surface. The model included an intrinsic exponential decay of the penetration depth. For the first time the spin-asymmetry was determined with high resolution over an extended Q-range for a HTc-film. Nb-films were investigated as reference.",

keywords = "High-T superconducting films, Magnetic penetration depth, Nb films, Polarized neutron reflection",

author = "Valeria Lauter-Pasyuk and Lauter, {H. J.} and Aksenov, {V. L.} and Kornilov, {E. I.} and Petrenko, {A. V.} and P. Leiderer",

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T1 - Determination of the magnetic field penetration depth in YBa2Cu3O7 superconducting films by polarized neutron reflectometry

AU - Lauter-Pasyuk, Valeria

AU - Lauter, H. J.

AU - Aksenov, V. L.

AU - Kornilov, E. I.

AU - Petrenko, A. V.

AU - Leiderer, P.

PY - 1998/6/15

Y1 - 1998/6/15

N2 - Polarized neutron reflectometry was used for the direct measurement of the magnetic-field penetration depth in a high-temperature (HTc) superconducting film. Two scattering geometries were used. The deduced neutron scattering length density profile gave an exact picture of the composition of the film. The fit to the spin-asymmetry yielded a magnetic-penetration depth of 1400 ± 100 Å at a temperature of T = 4.8 K along the c-axis oriented perpendicular to the film surface. The model included an intrinsic exponential decay of the penetration depth. For the first time the spin-asymmetry was determined with high resolution over an extended Q-range for a HTc-film. Nb-films were investigated as reference.

AB - Polarized neutron reflectometry was used for the direct measurement of the magnetic-field penetration depth in a high-temperature (HTc) superconducting film. Two scattering geometries were used. The deduced neutron scattering length density profile gave an exact picture of the composition of the film. The fit to the spin-asymmetry yielded a magnetic-penetration depth of 1400 ± 100 Å at a temperature of T = 4.8 K along the c-axis oriented perpendicular to the film surface. The model included an intrinsic exponential decay of the penetration depth. For the first time the spin-asymmetry was determined with high resolution over an extended Q-range for a HTc-film. Nb-films were investigated as reference.

KW - High-T superconducting films

KW - Magnetic penetration depth

KW - Nb films

KW - Polarized neutron reflection

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Determination of the magnetic field penetration depth in YBa2Cu3O7 superconducting films by polarized neutron reflectometry

Abstract

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