Flux pinning of Bi2Sr2CaCu2O8+δ/Ag superconductors utilizing (Sr,Ca)14Cu24O41 defects and nanophase Al2O3 and Au particles

T. Haugan; W. Wong-Ng; L. P. Cook; H. J. Brown; L. Swartzendruber; D. T. Shaw

doi:10.1016/S0921-4534(00)00157-X

Flux pinning of Bi₂Sr₂CaCu₂O_8+δ/Ag superconductors utilizing (Sr,Ca)₁₄Cu₂₄O₄₁ defects and nanophase Al₂O₃ and Au particles

T. Haugan
, W. Wong-Ng
, L. P. Cook
, H. J. Brown
, L. Swartzendruber
, D. T. Shaw

Department of Electrical Engineering

National Institute of Standards and Technology

Research output: Contribution to journal › Conference article › peer-review

23 Scopus citations

Abstract

Investigations into flux-pinning of Bi₂Sr₂CaCu₂O_8+δ/Ag (Bi-2212/Ag) thick film conductors utilizing micron-sized (Sr,Ca)₁₄Cu₂₄O₄₁ and nanophase Al₂O₃ and Au particles are described. Addition of defect particles delayed and reduced formation of 2212 c-axis texture, while improving film quality by inhibiting Sr:Ca:Cu:O defect formation. Oxide defects were observed to rapidly coarsen in the melt, simultaneously with beneficial increase of 2212 texture. Nanophase Al₂O₃ reacted rapidly (<4 min) with 2212-type melts (Sr:Ca = 1.33-2.07) to form solid-solution (Sr,Ca)₃Al₂O₆ with Sr:Ca ratio close to the Sr:Ca composition of the precursor matrix. Addition of nanophase Al₂O₃ improved the J_c (1 T) over the range 20-30 K, e.g. J_c (30 K, 1 T)/J_c (5 K, 0 T) = (<0.001), 0.005, and 0.065 for 0%, 10% and 46% molar addition, respectively. The addition of nanophase or micron-sized Au completely suppressed 2212 c-axis orientation for the processing temperatures tested.

Original language	English
Pages (from-to)	129-133
Number of pages	5
Journal	Physica C: Superconductivity and its Applications
Volume	335
Issue number	1
DOIs	https://doi.org/10.1016/S0921-4534(00)00157-X
State	Published - Jun 2000
Event	9th Japan-US Workshop on High-Tc Superconductors - Yamanashi, Jpn Duration: Oct 13 1999 → Oct 15 1999

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title = "Flux pinning of Bi2Sr2CaCu2O8+δ/Ag superconductors utilizing (Sr,Ca)14Cu24O41 defects and nanophase Al2O3 and Au particles",

abstract = "Investigations into flux-pinning of Bi2Sr2CaCu2O8+δ/Ag (Bi-2212/Ag) thick film conductors utilizing micron-sized (Sr,Ca)14Cu24O41 and nanophase Al2O3 and Au particles are described. Addition of defect particles delayed and reduced formation of 2212 c-axis texture, while improving film quality by inhibiting Sr:Ca:Cu:O defect formation. Oxide defects were observed to rapidly coarsen in the melt, simultaneously with beneficial increase of 2212 texture. Nanophase Al2O3 reacted rapidly (<4 min) with 2212-type melts (Sr:Ca = 1.33-2.07) to form solid-solution (Sr,Ca)3Al2O6 with Sr:Ca ratio close to the Sr:Ca composition of the precursor matrix. Addition of nanophase Al2O3 improved the Jc (1 T) over the range 20-30 K, e.g. Jc (30 K, 1 T)/Jc (5 K, 0 T) = (<0.001), 0.005, and 0.065 for 0\%, 10\% and 46\% molar addition, respectively. The addition of nanophase or micron-sized Au completely suppressed 2212 c-axis orientation for the processing temperatures tested.",

author = "T. Haugan and W. Wong-Ng and Cook, \{L. P.\} and Brown, \{H. J.\} and L. Swartzendruber and Shaw, \{D. T.\}",

year = "2000",

month = jun,

doi = "10.1016/S0921-4534(00)00157-X",

language = "English",

volume = "335",

pages = "129--133",

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

issn = "0921-4534",

publisher = "Elsevier B.V.",

number = "1",

note = "9th Japan-US Workshop on High-Tc Superconductors ; Conference date: 13-10-1999 Through 15-10-1999",

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T1 - Flux pinning of Bi2Sr2CaCu2O8+δ/Ag superconductors utilizing (Sr,Ca)14Cu24O41 defects and nanophase Al2O3 and Au particles

AU - Haugan, T.

AU - Wong-Ng, W.

AU - Cook, L. P.

AU - Brown, H. J.

AU - Swartzendruber, L.

AU - Shaw, D. T.

PY - 2000/6

Y1 - 2000/6

N2 - Investigations into flux-pinning of Bi2Sr2CaCu2O8+δ/Ag (Bi-2212/Ag) thick film conductors utilizing micron-sized (Sr,Ca)14Cu24O41 and nanophase Al2O3 and Au particles are described. Addition of defect particles delayed and reduced formation of 2212 c-axis texture, while improving film quality by inhibiting Sr:Ca:Cu:O defect formation. Oxide defects were observed to rapidly coarsen in the melt, simultaneously with beneficial increase of 2212 texture. Nanophase Al2O3 reacted rapidly (<4 min) with 2212-type melts (Sr:Ca = 1.33-2.07) to form solid-solution (Sr,Ca)3Al2O6 with Sr:Ca ratio close to the Sr:Ca composition of the precursor matrix. Addition of nanophase Al2O3 improved the Jc (1 T) over the range 20-30 K, e.g. Jc (30 K, 1 T)/Jc (5 K, 0 T) = (<0.001), 0.005, and 0.065 for 0%, 10% and 46% molar addition, respectively. The addition of nanophase or micron-sized Au completely suppressed 2212 c-axis orientation for the processing temperatures tested.

AB - Investigations into flux-pinning of Bi2Sr2CaCu2O8+δ/Ag (Bi-2212/Ag) thick film conductors utilizing micron-sized (Sr,Ca)14Cu24O41 and nanophase Al2O3 and Au particles are described. Addition of defect particles delayed and reduced formation of 2212 c-axis texture, while improving film quality by inhibiting Sr:Ca:Cu:O defect formation. Oxide defects were observed to rapidly coarsen in the melt, simultaneously with beneficial increase of 2212 texture. Nanophase Al2O3 reacted rapidly (<4 min) with 2212-type melts (Sr:Ca = 1.33-2.07) to form solid-solution (Sr,Ca)3Al2O6 with Sr:Ca ratio close to the Sr:Ca composition of the precursor matrix. Addition of nanophase Al2O3 improved the Jc (1 T) over the range 20-30 K, e.g. Jc (30 K, 1 T)/Jc (5 K, 0 T) = (<0.001), 0.005, and 0.065 for 0%, 10% and 46% molar addition, respectively. The addition of nanophase or micron-sized Au completely suppressed 2212 c-axis orientation for the processing temperatures tested.

UR - https://www.scopus.com/pages/publications/0033706297

U2 - 10.1016/S0921-4534(00)00157-X

DO - 10.1016/S0921-4534(00)00157-X

M3 - Conference article

AN - SCOPUS:0033706297

SN - 0921-4534

VL - 335

SP - 129

EP - 133

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 1

T2 - 9th Japan-US Workshop on High-Tc Superconductors

Y2 - 13 October 1999 through 15 October 1999

ER -

Flux pinning of Bi₂Sr₂CaCu₂O_8+δ/Ag superconductors utilizing (Sr,Ca)₁₄Cu₂₄O₄₁ defects and nanophase Al₂O₃ and Au particles

Abstract

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