Critical current density and flux pinning in Ho-doped melt-processed YBa2Cu3Oy

Yong Feng; Lian Zhou; Shejun Du; Xiaozu Wu; J. L. Tholence; J. C. Vallier; P. Monceau; B. Yin; Jinwei Li; Zhongxian Zhao; Yuheng Zhang

doi:10.1063/1.362912

Critical current density and flux pinning in Ho-doped melt-processed YBa₂Cu₃O_y

Yong Feng, Lian Zhou, Shejun Du, Xiaozu Wu, J. L. Tholence, J. C. Vallier, P. Monceau, B. Yin, Jinwei Li, Zhongxian Zhao, Yuheng Zhang

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Abstract

We fabricated highly textured Y_1-xHo_xBa₂Cu₃O_y (x=0, 0.2, 0.4, and 0.6) bulk samples by a "powder melting process" method under identical conditions and investigated their critical current densities and flux pinning behavior with a superconducting quantum interference device magnetometer. The dependence of J_c on the magnetic field, estimated by the Bean model, is studied. The results indicate that J_c drops with the magnetic field according to a power law J_c∝H^-n (n<0.5), which implies that the J_c value of these samples is controlled by the flux pinning rather weak links. It is found that J_c and flux pinning can be significantly improved by Ho substitution for Y in Y-based superconductors. The reduction of the size of Y₂BaCuO₅ particles, stress-field pinning, and magnetic pinning created by the Ho addition are considered to be responsible for the increase in J_c and flux pinning.

Original language	English
Pages (from-to)	993-997
Number of pages	5
Journal	Journal of Applied Physics
Volume	80
Issue number	2
DOIs	https://doi.org/10.1063/1.362912
State	Published - 15 Jul 1996
Externally published	Yes

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@article{73b20d2bc01741ccb18fe4881f013ebd,

title = "Critical current density and flux pinning in Ho-doped melt-processed YBa2Cu3Oy",

abstract = "We fabricated highly textured Y1-xHoxBa2Cu3Oy (x=0, 0.2, 0.4, and 0.6) bulk samples by a {"}powder melting process{"} method under identical conditions and investigated their critical current densities and flux pinning behavior with a superconducting quantum interference device magnetometer. The dependence of Jc on the magnetic field, estimated by the Bean model, is studied. The results indicate that Jc drops with the magnetic field according to a power law Jc∝H-n (n<0.5), which implies that the Jc value of these samples is controlled by the flux pinning rather weak links. It is found that Jc and flux pinning can be significantly improved by Ho substitution for Y in Y-based superconductors. The reduction of the size of Y2BaCuO5 particles, stress-field pinning, and magnetic pinning created by the Ho addition are considered to be responsible for the increase in Jc and flux pinning.",

author = "Yong Feng and Lian Zhou and Shejun Du and Xiaozu Wu and Tholence, {J. L.} and Vallier, {J. C.} and P. Monceau and B. Yin and Jinwei Li and Zhongxian Zhao and Yuheng Zhang",

year = "1996",

month = jul,

day = "15",

doi = "10.1063/1.362912",

language = "英语",

volume = "80",

pages = "993--997",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

number = "2",

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TY - JOUR

T1 - Critical current density and flux pinning in Ho-doped melt-processed YBa2Cu3Oy

AU - Feng, Yong

AU - Zhou, Lian

AU - Du, Shejun

AU - Wu, Xiaozu

AU - Tholence, J. L.

AU - Vallier, J. C.

AU - Monceau, P.

AU - Yin, B.

AU - Li, Jinwei

AU - Zhao, Zhongxian

AU - Zhang, Yuheng

PY - 1996/7/15

Y1 - 1996/7/15

N2 - We fabricated highly textured Y1-xHoxBa2Cu3Oy (x=0, 0.2, 0.4, and 0.6) bulk samples by a "powder melting process" method under identical conditions and investigated their critical current densities and flux pinning behavior with a superconducting quantum interference device magnetometer. The dependence of Jc on the magnetic field, estimated by the Bean model, is studied. The results indicate that Jc drops with the magnetic field according to a power law Jc∝H-n (n<0.5), which implies that the Jc value of these samples is controlled by the flux pinning rather weak links. It is found that Jc and flux pinning can be significantly improved by Ho substitution for Y in Y-based superconductors. The reduction of the size of Y2BaCuO5 particles, stress-field pinning, and magnetic pinning created by the Ho addition are considered to be responsible for the increase in Jc and flux pinning.

AB - We fabricated highly textured Y1-xHoxBa2Cu3Oy (x=0, 0.2, 0.4, and 0.6) bulk samples by a "powder melting process" method under identical conditions and investigated their critical current densities and flux pinning behavior with a superconducting quantum interference device magnetometer. The dependence of Jc on the magnetic field, estimated by the Bean model, is studied. The results indicate that Jc drops with the magnetic field according to a power law Jc∝H-n (n<0.5), which implies that the Jc value of these samples is controlled by the flux pinning rather weak links. It is found that Jc and flux pinning can be significantly improved by Ho substitution for Y in Y-based superconductors. The reduction of the size of Y2BaCuO5 particles, stress-field pinning, and magnetic pinning created by the Ho addition are considered to be responsible for the increase in Jc and flux pinning.

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U2 - 10.1063/1.362912

DO - 10.1063/1.362912

M3 - 文章

AN - SCOPUS:0030191203

SN - 0021-8979

VL - 80

SP - 993

EP - 997

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 2

ER -

Critical current density and flux pinning in Ho-doped melt-processed YBa₂Cu₃O_y

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