Pinning potential in thick PrBa2Cu3Ox/YBa2Cu3O7-delta quasi-multilayers

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@article{be81052c84b74a9db90f6f3dcf97cdd7,
title = "Pinning potential in thick PrBa2Cu3Ox/YBa2Cu3O7-delta quasi-multilayers",
abstract = "Using Pulsed Laser Deposition we have fabricated thick quasi-multilayers composed of incomplete layers of PrBa2Cu3Ox (PrBCO) nano-dots and layers of YBa2Cu3O7-delta (YBCO). The number of such sequences was between 2 and 6, with the thickness of individual YBCO layers between 565 and 885 rim, and total thickness between 1.13 and 5.31 mu m. For the thinner quasi-multilayer, DC magnetization studies showed an increase in the critical current density J(c) at all fields in comparison with a pure YBCO reference sample, while the thicker samples showed an increased J(c) only in high fields. We have also investigated the frequency dependence of J(c) from AC susceptibility studies and found that the pinning potential is well described by a logarithmic dependence on current density. Pinning potentials in PrBCO/YBCO quasi-multilayers also proved to be higher than in the reference sample at high fields. From angle-dependent transport measurements we have found indications of strong pinning centres induced by the (PrBCO) nanodots, both isotropic and c-axis correlated. (C) 2009 Elsevier B.V. All rights reserved.",
keywords = "Critical current density, YBCO films, Quasi-multilayers, Artificial pinning centres, Pinning potential",
author = "Ioan Crisan and Van-Son Dang and Pavlo Mikheenko and Yau Tse and Asis Sarkar and James Bowen and John Abell",
year = "2010",
month = jan,
day = "1",
doi = "10.1016/j.physc.2009.10.006",
language = "English",
volume = "470",
pages = "55--60",
journal = "Physica C: Superconductivity and its Applications",
issn = "0921-4534",
publisher = "Elsevier",
number = "1",

}

RIS

TY - JOUR

T1 - Pinning potential in thick PrBa2Cu3Ox/YBa2Cu3O7-delta quasi-multilayers

AU - Crisan, Ioan

AU - Dang, Van-Son

AU - Mikheenko, Pavlo

AU - Tse, Yau

AU - Sarkar, Asis

AU - Bowen, James

AU - Abell, John

PY - 2010/1/1

Y1 - 2010/1/1

N2 - Using Pulsed Laser Deposition we have fabricated thick quasi-multilayers composed of incomplete layers of PrBa2Cu3Ox (PrBCO) nano-dots and layers of YBa2Cu3O7-delta (YBCO). The number of such sequences was between 2 and 6, with the thickness of individual YBCO layers between 565 and 885 rim, and total thickness between 1.13 and 5.31 mu m. For the thinner quasi-multilayer, DC magnetization studies showed an increase in the critical current density J(c) at all fields in comparison with a pure YBCO reference sample, while the thicker samples showed an increased J(c) only in high fields. We have also investigated the frequency dependence of J(c) from AC susceptibility studies and found that the pinning potential is well described by a logarithmic dependence on current density. Pinning potentials in PrBCO/YBCO quasi-multilayers also proved to be higher than in the reference sample at high fields. From angle-dependent transport measurements we have found indications of strong pinning centres induced by the (PrBCO) nanodots, both isotropic and c-axis correlated. (C) 2009 Elsevier B.V. All rights reserved.

AB - Using Pulsed Laser Deposition we have fabricated thick quasi-multilayers composed of incomplete layers of PrBa2Cu3Ox (PrBCO) nano-dots and layers of YBa2Cu3O7-delta (YBCO). The number of such sequences was between 2 and 6, with the thickness of individual YBCO layers between 565 and 885 rim, and total thickness between 1.13 and 5.31 mu m. For the thinner quasi-multilayer, DC magnetization studies showed an increase in the critical current density J(c) at all fields in comparison with a pure YBCO reference sample, while the thicker samples showed an increased J(c) only in high fields. We have also investigated the frequency dependence of J(c) from AC susceptibility studies and found that the pinning potential is well described by a logarithmic dependence on current density. Pinning potentials in PrBCO/YBCO quasi-multilayers also proved to be higher than in the reference sample at high fields. From angle-dependent transport measurements we have found indications of strong pinning centres induced by the (PrBCO) nanodots, both isotropic and c-axis correlated. (C) 2009 Elsevier B.V. All rights reserved.

KW - Critical current density

KW - YBCO films

KW - Quasi-multilayers

KW - Artificial pinning centres

KW - Pinning potential

U2 - 10.1016/j.physc.2009.10.006

DO - 10.1016/j.physc.2009.10.006

M3 - Article

VL - 470

SP - 55

EP - 60

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

IS - 1

ER -