Effect of Hafnium Impurities on the Magnetoresistance of YBa2Cu3O7−δ

S. V. Savich; A. V. Samoylov; S. N. Kamchatnaya; I. L. Goulatis; R. V. Vovk; Alexander Chroneos; A. L. Solovjov; L. V. Omelchenko

doi:10.1007/s10909-016-1703-9

Effect of Hafnium Impurities on the Magnetoresistance of YBa2Cu3O7−δ

S. V. Savich, A. V. Samoylov, S. N. Kamchatnaya, I. L. Goulatis, R. V. Vovk, Alexander Chroneos, A. L. Solovjov, L. V. Omelchenko

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Abstract

In the present study, we investigate the influence of the hafnium (Hf) impurities on the magnetoresistance of YBa2Cu3O7−δYBa2Cu3O7−δ ceramic samples in the temperature interval of the transition to the superconducting state in constant magnetic field up to 12 T. The cause of the appearance of low- temperature “tails” (paracoherent transitions) on the resistive transitions, corresponding to different phase regimes of the vortex matter state is discussed. At temperatures higher than the critical temperature (T > Tc)Tc) , the temperature dependence of the excess paraconductivity can be described within the Aslamazov–Larkin theoretical model of the fluctuation conductivity for layered superconductors.

Original language	English
Journal	Journal of Low Temperature Physics
Volume	(in press)
DOIs	https://doi.org/10.1007/s10909-016-1703-9
Publication status	Published - 21 Nov 2016

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This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Keywords

Excess conductivity
YBa2Cu3O7−δYBa2Cu3O7−δ ceramic
Hf impurities
Pinning
2D–3D crossover
Coherent length

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title = "Effect of Hafnium Impurities on the Magnetoresistance of YBa2Cu3O7−δ",

abstract = "In the present study, we investigate the influence of the hafnium (Hf) impurities on the magnetoresistance of YBa2Cu3O7−δYBa2Cu3O7−δ ceramic samples in the temperature interval of the transition to the superconducting state in constant magnetic field up to 12 T. The cause of the appearance of low- temperature “tails” (paracoherent transitions) on the resistive transitions, corresponding to different phase regimes of the vortex matter state is discussed. At temperatures higher than the critical temperature (T > Tc)Tc) , the temperature dependence of the excess paraconductivity can be described within the Aslamazov–Larkin theoretical model of the fluctuation conductivity for layered superconductors. ",

keywords = "Excess conductivity, YBa2Cu3O7−δYBa2Cu3O7−δ ceramic, Hf impurities, Pinning, 2D–3D crossover, Coherent length",

author = "Savich, {S. V.} and Samoylov, {A. V.} and Kamchatnaya, {S. N.} and Goulatis, {I. L.} and Vovk, {R. V.} and Alexander Chroneos and Solovjov, {A. L.} and Omelchenko, {L. V.}",

note = "This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.",

year = "2016",

month = nov,

day = "21",

doi = "10.1007/s10909-016-1703-9",

language = "English",

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journal = "Journal of Low Temperature Physics",

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T1 - Effect of Hafnium Impurities on the Magnetoresistance of YBa2Cu3O7−δ

AU - Savich, S. V.

AU - Samoylov, A. V.

AU - Kamchatnaya, S. N.

AU - Goulatis, I. L.

AU - Vovk, R. V.

AU - Chroneos, Alexander

AU - Solovjov, A. L.

AU - Omelchenko, L. V.

N1 - This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

PY - 2016/11/21

Y1 - 2016/11/21

N2 - In the present study, we investigate the influence of the hafnium (Hf) impurities on the magnetoresistance of YBa2Cu3O7−δYBa2Cu3O7−δ ceramic samples in the temperature interval of the transition to the superconducting state in constant magnetic field up to 12 T. The cause of the appearance of low- temperature “tails” (paracoherent transitions) on the resistive transitions, corresponding to different phase regimes of the vortex matter state is discussed. At temperatures higher than the critical temperature (T > Tc)Tc) , the temperature dependence of the excess paraconductivity can be described within the Aslamazov–Larkin theoretical model of the fluctuation conductivity for layered superconductors.

AB - In the present study, we investigate the influence of the hafnium (Hf) impurities on the magnetoresistance of YBa2Cu3O7−δYBa2Cu3O7−δ ceramic samples in the temperature interval of the transition to the superconducting state in constant magnetic field up to 12 T. The cause of the appearance of low- temperature “tails” (paracoherent transitions) on the resistive transitions, corresponding to different phase regimes of the vortex matter state is discussed. At temperatures higher than the critical temperature (T > Tc)Tc) , the temperature dependence of the excess paraconductivity can be described within the Aslamazov–Larkin theoretical model of the fluctuation conductivity for layered superconductors.

KW - Excess conductivity

KW - YBa2Cu3O7−δYBa2Cu3O7−δ ceramic

KW - Hf impurities

KW - Pinning

KW - 2D–3D crossover

KW - Coherent length

U2 - 10.1007/s10909-016-1703-9

DO - 10.1007/s10909-016-1703-9

M3 - Article

SN - 0022-2291

SN - 1573-7357

VL - (in press)

JO - Journal of Low Temperature Physics

JF - Journal of Low Temperature Physics

ER -

Effect of Hafnium Impurities on the Magnetoresistance of YBa2Cu3O7−δ

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