Lithium-doping-assisted growth of HgBa2Ca2Cu3O8+δ superconducting phase in bulks and thin films

A. A. Gapud; T. Aytug; S. H. Yoo; Y. Y. Xie; B. W. Kang; S. D. Gapud; J. Z. Wu; S. W. Wu; W. Y. Liang; X. T. Cui; J. R. Liu; W. K. Chu

doi:10.1016/S0921-4534(98)00570-X

Lithium-doping-assisted growth of HgBa₂Ca₂Cu₃O_8+δ superconducting phase in bulks and thin films

A. A. Gapud, T. Aytug, S. H. Yoo, Y. Y. Xie, B. W. Kang, S. D. Gapud, J. Z. Wu, S. W. Wu, W. Y. Liang, X. T. Cui, J. R. Liu, W. K. Chu

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

4 Scopus citations

Abstract

The superconducting HgBa₂Ca₂Cu₃O_8+δ (Hg-1223) phase has been successfully formed at temperatures as low as 720°C, by the addition of Li at a level of 0.1 to 0.4 per unit cell, thus effectively lowering the processing temperature by more than 100°C. Data indicate that Li most likely forms a flux which catalyzes the reaction of constituents and the formation of superconducting domains at low temperatures. There are indications that the Li may also help improve the onset of superconductivity by locally perturbing the electronic structure as an interstitial. Applying the process to thin-film fabrication has successfully produced c-oriented film with 73% Hg-1223 phase purity at a processing temperature of 800°C and 0.2 Li doping level.

Original language	English
Pages (from-to)	264-278
Number of pages	15
Journal	Physica C: Superconductivity and its Applications
Volume	308
Issue number	3-4
DOIs	https://doi.org/10.1016/S0921-4534(98)00570-X
State	Published - Nov 20 1998
Externally published	Yes

Funding

This work is supported in part by US AFOSR and NSF EPSCOR funds. We are also very grateful to Midwest Superconductivity, for the use of their SQUID, particularly for valuable help from G. Sun in the fabrication of sputtering targets.

Funders	Funder number
US AFOSR
National Science Foundation

Keywords

Hg-1223
High temperature superconductivity
Lithium
Thin films

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/S0921-4534(98)00570-X

Cite this

Gapud, A. A., Aytug, T., Yoo, S. H., Xie, Y. Y., Kang, B. W., Gapud, S. D., Wu, J. Z., Wu, S. W., Liang, W. Y., Cui, X. T., Liu, J. R., & Chu, W. K. (1998). Lithium-doping-assisted growth of HgBa₂Ca₂Cu₃O_8+δ superconducting phase in bulks and thin films. Physica C: Superconductivity and its Applications, 308(3-4), 264-278. https://doi.org/10.1016/S0921-4534(98)00570-X

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title = "Lithium-doping-assisted growth of HgBa2Ca2Cu3O8+δ superconducting phase in bulks and thin films",

abstract = "The superconducting HgBa2Ca2Cu3O8+δ (Hg-1223) phase has been successfully formed at temperatures as low as 720°C, by the addition of Li at a level of 0.1 to 0.4 per unit cell, thus effectively lowering the processing temperature by more than 100°C. Data indicate that Li most likely forms a flux which catalyzes the reaction of constituents and the formation of superconducting domains at low temperatures. There are indications that the Li may also help improve the onset of superconductivity by locally perturbing the electronic structure as an interstitial. Applying the process to thin-film fabrication has successfully produced c-oriented film with 73% Hg-1223 phase purity at a processing temperature of 800°C and 0.2 Li doping level.",

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author = "Gapud, {A. A.} and T. Aytug and Yoo, {S. H.} and Xie, {Y. Y.} and Kang, {B. W.} and Gapud, {S. D.} and Wu, {J. Z.} and Wu, {S. W.} and Liang, {W. Y.} and Cui, {X. T.} and Liu, {J. R.} and Chu, {W. K.}",

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T1 - Lithium-doping-assisted growth of HgBa2Ca2Cu3O8+δ superconducting phase in bulks and thin films

AU - Gapud, A. A.

AU - Aytug, T.

AU - Yoo, S. H.

AU - Xie, Y. Y.

AU - Kang, B. W.

AU - Gapud, S. D.

AU - Wu, J. Z.

AU - Wu, S. W.

AU - Liang, W. Y.

AU - Cui, X. T.

AU - Liu, J. R.

AU - Chu, W. K.

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N2 - The superconducting HgBa2Ca2Cu3O8+δ (Hg-1223) phase has been successfully formed at temperatures as low as 720°C, by the addition of Li at a level of 0.1 to 0.4 per unit cell, thus effectively lowering the processing temperature by more than 100°C. Data indicate that Li most likely forms a flux which catalyzes the reaction of constituents and the formation of superconducting domains at low temperatures. There are indications that the Li may also help improve the onset of superconductivity by locally perturbing the electronic structure as an interstitial. Applying the process to thin-film fabrication has successfully produced c-oriented film with 73% Hg-1223 phase purity at a processing temperature of 800°C and 0.2 Li doping level.

AB - The superconducting HgBa2Ca2Cu3O8+δ (Hg-1223) phase has been successfully formed at temperatures as low as 720°C, by the addition of Li at a level of 0.1 to 0.4 per unit cell, thus effectively lowering the processing temperature by more than 100°C. Data indicate that Li most likely forms a flux which catalyzes the reaction of constituents and the formation of superconducting domains at low temperatures. There are indications that the Li may also help improve the onset of superconductivity by locally perturbing the electronic structure as an interstitial. Applying the process to thin-film fabrication has successfully produced c-oriented film with 73% Hg-1223 phase purity at a processing temperature of 800°C and 0.2 Li doping level.

KW - Hg-1223

KW - High temperature superconductivity

KW - Lithium

KW - Thin films

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