Flux pinning in TlBa2Ca2Cu3Ox through addition of nanophase Al2O3

S. Sengupta; V. R. Todt; P. Kostic; Y. L. Chen; M. T. Lanagan; K. C. Goretta

doi:10.1016/0921-4534(96)00191-8

Flux pinning in TlBa₂Ca₂Cu₃O_x through addition of nanophase Al₂O₃

S. Sengupta, V. R. Todt, P. Kostic, Y. L. Chen, M. T. Lanagan, K. C. Goretta

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

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Abstract

Nanophase Al₂O₃ powders were added to TlBa₂Ca₂Cu₃O_x powders in 20 mol.% concentrations. Pellets produced from powders with and without nanophase oxides were heated in O₂ above the peritectic melting temperatures and cooled at 10°C/h. For temperatures ≤ 35 K, the intragranular critical current density, J_c, increased dramatically for all specimens with the Al₂O₃ additions. However, no significant changes in J_c with Al₂O₃ additions were observed at 77 K. The enhancement in Jc appears to be associated with the presence of nanometer-sized inclusions in the superconductor. The pinning by the inclusions can be understood by considering the interaction between flux lines and cavities. It is shown that for pinning by such cavities to be effective, the cavities must be small, numerous, and well-distributed.

Original language	English (US)
Pages (from-to)	34-42
Number of pages	9
Journal	Physica C: Superconductivity and its applications
Volume	264
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(96)00191-8
State	Published - Jun 1 1996

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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title = "Flux pinning in TlBa2Ca2Cu3Ox through addition of nanophase Al2O3",

abstract = "Nanophase Al2O3 powders were added to TlBa2Ca2Cu3Ox powders in 20 mol.% concentrations. Pellets produced from powders with and without nanophase oxides were heated in O2 above the peritectic melting temperatures and cooled at 10°C/h. For temperatures ≤ 35 K, the intragranular critical current density, Jc, increased dramatically for all specimens with the Al2O3 additions. However, no significant changes in Jc with Al2O3 additions were observed at 77 K. The enhancement in Jc appears to be associated with the presence of nanometer-sized inclusions in the superconductor. The pinning by the inclusions can be understood by considering the interaction between flux lines and cavities. It is shown that for pinning by such cavities to be effective, the cavities must be small, numerous, and well-distributed.",

author = "S. Sengupta and Todt, {V. R.} and P. Kostic and Chen, {Y. L.} and Lanagan, {M. T.} and Goretta, {K. C.}",

note = "Funding Information: Guo andS martR . Olsonf or experimentaasl sistance, andJ enniferA . Lewis for helpfula dviceT. his work was supportedb y the US Departmenotf Energy (DOE), EnergyE fficiencya ndR enewablEen ergy,a s part of a DOE programt o develope lectricp ower technologya,n d Basic Energy Sciences( Materials Sciences)u,n derC ontracWt -31-109-Eng-38.",

year = "1996",

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doi = "10.1016/0921-4534(96)00191-8",

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T1 - Flux pinning in TlBa2Ca2Cu3Ox through addition of nanophase Al2O3

AU - Sengupta, S.

AU - Todt, V. R.

AU - Kostic, P.

AU - Chen, Y. L.

AU - Lanagan, M. T.

AU - Goretta, K. C.

N1 - Funding Information: Guo andS martR . Olsonf or experimentaasl sistance, andJ enniferA . Lewis for helpfula dviceT. his work was supportedb y the US Departmenotf Energy (DOE), EnergyE fficiencya ndR enewablEen ergy,a s part of a DOE programt o develope lectricp ower technologya,n d Basic Energy Sciences( Materials Sciences)u,n derC ontracWt -31-109-Eng-38.

PY - 1996/6/1

Y1 - 1996/6/1

N2 - Nanophase Al2O3 powders were added to TlBa2Ca2Cu3Ox powders in 20 mol.% concentrations. Pellets produced from powders with and without nanophase oxides were heated in O2 above the peritectic melting temperatures and cooled at 10°C/h. For temperatures ≤ 35 K, the intragranular critical current density, Jc, increased dramatically for all specimens with the Al2O3 additions. However, no significant changes in Jc with Al2O3 additions were observed at 77 K. The enhancement in Jc appears to be associated with the presence of nanometer-sized inclusions in the superconductor. The pinning by the inclusions can be understood by considering the interaction between flux lines and cavities. It is shown that for pinning by such cavities to be effective, the cavities must be small, numerous, and well-distributed.

AB - Nanophase Al2O3 powders were added to TlBa2Ca2Cu3Ox powders in 20 mol.% concentrations. Pellets produced from powders with and without nanophase oxides were heated in O2 above the peritectic melting temperatures and cooled at 10°C/h. For temperatures ≤ 35 K, the intragranular critical current density, Jc, increased dramatically for all specimens with the Al2O3 additions. However, no significant changes in Jc with Al2O3 additions were observed at 77 K. The enhancement in Jc appears to be associated with the presence of nanometer-sized inclusions in the superconductor. The pinning by the inclusions can be understood by considering the interaction between flux lines and cavities. It is shown that for pinning by such cavities to be effective, the cavities must be small, numerous, and well-distributed.

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Flux pinning in TlBa₂Ca₂Cu₃O_x through addition of nanophase Al₂O₃

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