Current Transport Across Grain Boundaries in Tlba2Ca2Cu30X Thick Polycrystalline Films and Yba2Cu307 Step Edges

J. D. Hettinger; D. H. Kim; D. J. Miller; J. G. Hu; K. E. Gray; J. E. Sharping; K. Daly; C. Pettiette-Hall; J. E. Tkaczyk; J. Deluca

doi:10.1109/77.233408

Current Transport Across Grain Boundaries in Tlba2Ca2Cu30X Thick Polycrystalline Films and Yba2Cu307 Step Edges

J. D. Hettinger, D. H. Kim, D. J. Miller, J. G. Hu, K. E. Gray, J. E. Sharping, K. Daly, C. Pettiette-Hall, J. E. Tkaczyk, J. Deluca

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Abstract

We have performed transport measurements in magnetic fields (H//c) up to 10T on a series of YBa2Cu3U7 grain boundaries induced by epitaxial growth on a substrate containing a series of step edges. For this material we find an activation energy which goes as U(T)~(l-t). Electric field versus current density curves taken at a constant temperature while varying the magnetic field allows a determination of the magnetic field dependence of the activation energy using the Ambagaokar-Halperin model. These values agree with results extracted from the resistive transitions. Similar characterizations of a sample of TlBa2Ca2Cu30x are also presented. The temperature dependence of the activation energy for this system may be summarized as U(T)~(l-t)2, suggesting that the grain boundaries behave as SNS juctions.

Original language	English (US)
Pages (from-to)	1211-1214
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	3
Issue number	1
DOIs	https://doi.org/10.1109/77.233408
State	Published - Mar 1993
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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@article{62bebb19d6c34be3843f8e7190b22423,

title = "Current Transport Across Grain Boundaries in Tlba2Ca2Cu30X Thick Polycrystalline Films and Yba2Cu307 Step Edges",

abstract = "We have performed transport measurements in magnetic fields (H//c) up to 10T on a series of YBa2Cu3U7 grain boundaries induced by epitaxial growth on a substrate containing a series of step edges. For this material we find an activation energy which goes as U(T)~(l-t). Electric field versus current density curves taken at a constant temperature while varying the magnetic field allows a determination of the magnetic field dependence of the activation energy using the Ambagaokar-Halperin model. These values agree with results extracted from the resistive transitions. Similar characterizations of a sample of TlBa2Ca2Cu30x are also presented. The temperature dependence of the activation energy for this system may be summarized as U(T)~(l-t)2, suggesting that the grain boundaries behave as SNS juctions.",

author = "Hettinger, {J. D.} and Kim, {D. H.} and Miller, {D. J.} and Hu, {J. G.} and Gray, {K. E.} and Sharping, {J. E.} and K. Daly and C. Pettiette-Hall and Tkaczyk, {J. E.} and J. Deluca",

note = "Funding Information: This work was supported by the United States Department of Energy, Division of Basic Energy Sciences-Materials Sciences, and Conservation and renewable Energy as a part of a program to develop electric Power Technology, under Contract No. W-31- 109-ENG-38(J DH,DTM,JH,KEG,J S) and by the National Science Foundation as part of the Science and Technology Center for Superconductivity under Contract No. DMR 88-09854 (DHK).",

year = "1993",

month = mar,

doi = "10.1109/77.233408",

language = "English (US)",

volume = "3",

pages = "1211--1214",

journal = "IEEE Transactions on Applied Superconductivity",

issn = "1051-8223",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "1",

}

TY - JOUR

T1 - Current Transport Across Grain Boundaries in Tlba2Ca2Cu30X Thick Polycrystalline Films and Yba2Cu307 Step Edges

AU - Hettinger, J. D.

AU - Kim, D. H.

AU - Miller, D. J.

AU - Hu, J. G.

AU - Gray, K. E.

AU - Sharping, J. E.

AU - Daly, K.

AU - Pettiette-Hall, C.

AU - Tkaczyk, J. E.

AU - Deluca, J.

N1 - Funding Information: This work was supported by the United States Department of Energy, Division of Basic Energy Sciences-Materials Sciences, and Conservation and renewable Energy as a part of a program to develop electric Power Technology, under Contract No. W-31- 109-ENG-38(J DH,DTM,JH,KEG,J S) and by the National Science Foundation as part of the Science and Technology Center for Superconductivity under Contract No. DMR 88-09854 (DHK).

PY - 1993/3

Y1 - 1993/3

N2 - We have performed transport measurements in magnetic fields (H//c) up to 10T on a series of YBa2Cu3U7 grain boundaries induced by epitaxial growth on a substrate containing a series of step edges. For this material we find an activation energy which goes as U(T)~(l-t). Electric field versus current density curves taken at a constant temperature while varying the magnetic field allows a determination of the magnetic field dependence of the activation energy using the Ambagaokar-Halperin model. These values agree with results extracted from the resistive transitions. Similar characterizations of a sample of TlBa2Ca2Cu30x are also presented. The temperature dependence of the activation energy for this system may be summarized as U(T)~(l-t)2, suggesting that the grain boundaries behave as SNS juctions.

AB - We have performed transport measurements in magnetic fields (H//c) up to 10T on a series of YBa2Cu3U7 grain boundaries induced by epitaxial growth on a substrate containing a series of step edges. For this material we find an activation energy which goes as U(T)~(l-t). Electric field versus current density curves taken at a constant temperature while varying the magnetic field allows a determination of the magnetic field dependence of the activation energy using the Ambagaokar-Halperin model. These values agree with results extracted from the resistive transitions. Similar characterizations of a sample of TlBa2Ca2Cu30x are also presented. The temperature dependence of the activation energy for this system may be summarized as U(T)~(l-t)2, suggesting that the grain boundaries behave as SNS juctions.

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Current Transport Across Grain Boundaries in Tlba2Ca2Cu30X Thick Polycrystalline Films and Yba2Cu307 Step Edges

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