Thermal fluctuation in high-temperature superconductor HgBa2CaCu2O6+δ

Z. J. Huang; Y. Y. Xue; R. L. Meng; X. D. Qiu; Z. D. Hao; C. W. Chu

doi:10.1016/0921-4534(94)90411-1

Thermal fluctuation in high-temperature superconductor HgBa₂CaCu₂O_6+δ

Z. J. Huang, Y. Y. Xue, R. L. Meng, X. D. Qiu, Z. D. Hao, C. W. Chu

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Abstract

The reversible magnetization M has been carefully measured on a polycrystalline HgBa₂CaCu₂O_6+δ sample (Hg-1212), with a superconducting transition temperature T_c{reversed tilde}119 K and a transition width ΔT{reversed tilde}2 K. The magnetization is field independent at 116 K, suggesting a significant role of thermal fluctuations. The value of this magnetization leads to an estimated superconducting volume fraction of 65% based on a quasi-2D thermal fluctuation model. After corrections for fluctuation and random grain orientation, the superconducting parameters of κ{reversed tilde}60, H_c2(0) {reversed tilde} 53 T, ξ_ab(0) {reversed tilde} 25 Å, and λ_ab(0) {reversed tilde} 1500 Å are obtained.

Original language	English
Pages (from-to)	211-215
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	228
Issue number	3-4
DOIs	https://doi.org/10.1016/0921-4534(94)90411-1
Publication status	Published - 1994 Jul 20

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/0921-4534(94)90411-1

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@article{f19b0b3659214470b1da81784b9f008e,

title = "Thermal fluctuation in high-temperature superconductor HgBa2CaCu2O6+δ",

abstract = "The reversible magnetization M has been carefully measured on a polycrystalline HgBa2CaCu2O6+δ sample (Hg-1212), with a superconducting transition temperature Tc{reversed tilde}119 K and a transition width ΔT{reversed tilde}2 K. The magnetization is field independent at 116 K, suggesting a significant role of thermal fluctuations. The value of this magnetization leads to an estimated superconducting volume fraction of 65% based on a quasi-2D thermal fluctuation model. After corrections for fluctuation and random grain orientation, the superconducting parameters of κ{reversed tilde}60, Hc2(0) {reversed tilde} 53 T, ξab(0) {reversed tilde} 25 {\AA}, and λab(0) {reversed tilde} 1500 {\AA} are obtained.",

author = "Huang, {Z. J.} and Xue, {Y. Y.} and Meng, {R. L.} and Qiu, {X. D.} and Hao, {Z. D.} and Chu, {C. W.}",

note = "Funding Information: This work is supported in part by USAFOSR F49620-93-1-0310N,S F Grant No. NMR 91-22043, ARPA Grant No. MDA 972-90-J-1001T. exasCenter for Superconductiviatytthe Universityo f Houston,a nd the T.L.L. Temple Foundation.",

year = "1994",

month = jul,

day = "20",

doi = "10.1016/0921-4534(94)90411-1",

language = "English",

volume = "228",

pages = "211--215",

journal = "Physica C: Superconductivity and its applications",

issn = "0921-4534",

publisher = "Elsevier",

number = "3-4",

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TY - JOUR

T1 - Thermal fluctuation in high-temperature superconductor HgBa2CaCu2O6+δ

AU - Huang, Z. J.

AU - Xue, Y. Y.

AU - Meng, R. L.

AU - Qiu, X. D.

AU - Hao, Z. D.

AU - Chu, C. W.

N1 - Funding Information: This work is supported in part by USAFOSR F49620-93-1-0310N,S F Grant No. NMR 91-22043, ARPA Grant No. MDA 972-90-J-1001T. exasCenter for Superconductiviatytthe Universityo f Houston,a nd the T.L.L. Temple Foundation.

PY - 1994/7/20

Y1 - 1994/7/20

N2 - The reversible magnetization M has been carefully measured on a polycrystalline HgBa2CaCu2O6+δ sample (Hg-1212), with a superconducting transition temperature Tc{reversed tilde}119 K and a transition width ΔT{reversed tilde}2 K. The magnetization is field independent at 116 K, suggesting a significant role of thermal fluctuations. The value of this magnetization leads to an estimated superconducting volume fraction of 65% based on a quasi-2D thermal fluctuation model. After corrections for fluctuation and random grain orientation, the superconducting parameters of κ{reversed tilde}60, Hc2(0) {reversed tilde} 53 T, ξab(0) {reversed tilde} 25 Å, and λab(0) {reversed tilde} 1500 Å are obtained.

AB - The reversible magnetization M has been carefully measured on a polycrystalline HgBa2CaCu2O6+δ sample (Hg-1212), with a superconducting transition temperature Tc{reversed tilde}119 K and a transition width ΔT{reversed tilde}2 K. The magnetization is field independent at 116 K, suggesting a significant role of thermal fluctuations. The value of this magnetization leads to an estimated superconducting volume fraction of 65% based on a quasi-2D thermal fluctuation model. After corrections for fluctuation and random grain orientation, the superconducting parameters of κ{reversed tilde}60, Hc2(0) {reversed tilde} 53 T, ξab(0) {reversed tilde} 25 Å, and λab(0) {reversed tilde} 1500 Å are obtained.

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U2 - 10.1016/0921-4534(94)90411-1

DO - 10.1016/0921-4534(94)90411-1

M3 - Article

AN - SCOPUS:0028468131

SN - 0921-4534

VL - 228

SP - 211

EP - 215

JO - Physica C: Superconductivity and its applications

JF - Physica C: Superconductivity and its applications

IS - 3-4

ER -

Thermal fluctuation in high-temperature superconductor HgBa₂CaCu₂O_6+δ

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