Thermopower and resistivity measurements on oxygen-annealed HgBa2CaCu2O6+δ

Y. T. Ren; J. Clayhold; F. Chen; Z. J. Huang; X. D. Qiu; Y. Y. Sun; R. L. Meng; Y. Y. Xue; C. W. Chu

doi:10.1016/0921-4534(93)90787-Q

Thermopower and resistivity measurements on oxygen-annealed HgBa₂CaCu₂O_6+δ

Y. T. Ren
, J. Clayhold
, F. Chen
, Z. J. Huang
, X. D. Qiu
, Y. Y. Sun
, R. L. Meng
, Y. Y. Xue
, C. W. Chu

Executive Vice President

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

We have measured the thermoelectric power and resistivity of the 120 K superconductor HgBa₂CaCu₂O_6+δ (Hg-1212) as a function of temperature and oxygen annealing. Before annealing the Seebeck coefficient is moderate and positive, suggesting that the as-grown compound is slightly under-doped. After annealing in oxygen at 200°C for 10 h, T_c was enhanced by 5 K. Further annealing increased T_c by an additional 1 K and sharpened the transition. The thermopower shifts downward with increasing doping by oxygen annealing, resembling that of the Bi-based and Tl-based systems. The carrier concentration was estimated from thermopower data and the T_c value as ∼0.13 and ∼0.14 per Cu before and after oxygen annealing, respectively.

Original language	English
Pages (from-to)	6-10
Number of pages	5
Journal	Physica C: Superconductivity and its Applications
Volume	217
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(93)90787-Q
Publication status	Published - 1993 Nov 10

All Science Journal Classification (ASJC) codes

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

Access to Document

10.1016/0921-4534(93)90787-Q

Cite this

@article{311602e24dee453a8857ba1ead5d51d5,

title = "Thermopower and resistivity measurements on oxygen-annealed HgBa2CaCu2O6+δ",

abstract = "We have measured the thermoelectric power and resistivity of the 120 K superconductor HgBa2CaCu2O6+δ (Hg-1212) as a function of temperature and oxygen annealing. Before annealing the Seebeck coefficient is moderate and positive, suggesting that the as-grown compound is slightly under-doped. After annealing in oxygen at 200°C for 10 h, Tc was enhanced by 5 K. Further annealing increased Tc by an additional 1 K and sharpened the transition. The thermopower shifts downward with increasing doping by oxygen annealing, resembling that of the Bi-based and Tl-based systems. The carrier concentration was estimated from thermopower data and the Tc value as ∼0.13 and ∼0.14 per Cu before and after oxygen annealing, respectively.",

author = "Ren, \{Y. T.\} and J. Clayhold and F. Chen and Huang, \{Z. J.\} and Qiu, \{X. D.\} and Sun, \{Y. Y.\} and Meng, \{R. L.\} and Xue, \{Y. Y.\} and Chu, \{C. W.\}",

note = "Funding Information: This work is supportedin part by USAFOSR F49620-93-1-031N0S, F GrantN o. DMR 91-22043, DARPA Grant No. MDA 972-88-G-002t,h e Texas Center for Superconductiviatyt the Universityo f Houston,a ndthe T.L.L. TempleF oundation.",

year = "1993",

month = nov,

day = "10",

doi = "10.1016/0921-4534(93)90787-Q",

language = "English",

volume = "217",

pages = "6--10",

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

issn = "0921-4534",

publisher = "Elsevier BV",

number = "1-2",

}

TY - JOUR

T1 - Thermopower and resistivity measurements on oxygen-annealed HgBa2CaCu2O6+δ

AU - Ren, Y. T.

AU - Clayhold, J.

AU - Chen, F.

AU - Huang, Z. J.

AU - Qiu, X. D.

AU - Sun, Y. Y.

AU - Meng, R. L.

AU - Xue, Y. Y.

AU - Chu, C. W.

N1 - Funding Information: This work is supportedin part by USAFOSR F49620-93-1-031N0S, F GrantN o. DMR 91-22043, DARPA Grant No. MDA 972-88-G-002t,h e Texas Center for Superconductiviatyt the Universityo f Houston,a ndthe T.L.L. TempleF oundation.

PY - 1993/11/10

Y1 - 1993/11/10

N2 - We have measured the thermoelectric power and resistivity of the 120 K superconductor HgBa2CaCu2O6+δ (Hg-1212) as a function of temperature and oxygen annealing. Before annealing the Seebeck coefficient is moderate and positive, suggesting that the as-grown compound is slightly under-doped. After annealing in oxygen at 200°C for 10 h, Tc was enhanced by 5 K. Further annealing increased Tc by an additional 1 K and sharpened the transition. The thermopower shifts downward with increasing doping by oxygen annealing, resembling that of the Bi-based and Tl-based systems. The carrier concentration was estimated from thermopower data and the Tc value as ∼0.13 and ∼0.14 per Cu before and after oxygen annealing, respectively.

AB - We have measured the thermoelectric power and resistivity of the 120 K superconductor HgBa2CaCu2O6+δ (Hg-1212) as a function of temperature and oxygen annealing. Before annealing the Seebeck coefficient is moderate and positive, suggesting that the as-grown compound is slightly under-doped. After annealing in oxygen at 200°C for 10 h, Tc was enhanced by 5 K. Further annealing increased Tc by an additional 1 K and sharpened the transition. The thermopower shifts downward with increasing doping by oxygen annealing, resembling that of the Bi-based and Tl-based systems. The carrier concentration was estimated from thermopower data and the Tc value as ∼0.13 and ∼0.14 per Cu before and after oxygen annealing, respectively.

UR - https://www.scopus.com/pages/publications/0027695755

UR - https://www.scopus.com/pages/publications/0027695755#tab=citedBy

U2 - 10.1016/0921-4534(93)90787-Q

DO - 10.1016/0921-4534(93)90787-Q

M3 - Article

AN - SCOPUS:0027695755

SN - 0921-4534

VL - 217

SP - 6

EP - 10

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 1-2

ER -

Thermopower and resistivity measurements on oxygen-annealed HgBa₂CaCu₂O_6+δ

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this