High Critical Current Densities in Nb3Sn Films with Engineered Microstructures--Artifical Pinning Microstructures

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Films with layers of Nb, Cu, and Sn have been fabricated to simulate a Nb{sub 3}Sn bronze-type process. These Nb{sub 3}Sn films have produced critical current densities greater than 1 x 10{sup 6} A/cm{sup 2} at 4.2 K and 7.5 T. Niobium films doped with Y, Sc, Dy, Al{sub 2}O{sub 3}, and Ti have been deposited with e-beam co-evaporation onto 75 mm diameter Si wafers with a 100 nm SiO{sub 2} buffer layer. The Nb layer was followed by a layer of Cu and a layer of Sn to complete the bronze-type process. The films with the highest J{sub c} ... continued below

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Dietderich, D.R.; Kelman, M.; Litty, J.R. & Scanlan, R.M. July 1, 1997.

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Films with layers of Nb, Cu, and Sn have been fabricated to simulate a Nb{sub 3}Sn bronze-type process. These Nb{sub 3}Sn films have produced critical current densities greater than 1 x 10{sup 6} A/cm{sup 2} at 4.2 K and 7.5 T. Niobium films doped with Y, Sc, Dy, Al{sub 2}O{sub 3}, and Ti have been deposited with e-beam co-evaporation onto 75 mm diameter Si wafers with a 100 nm SiO{sub 2} buffer layer. The Nb layer was followed by a layer of Cu and a layer of Sn to complete the bronze-type process. The films with the highest J{sub c} had about 8 vol. % Sc and about 18 vol. % Al{sub 2}O{sub 3}. Characterization of the microstructure by TEM shows that these high J{sub c} films contained high density of inclusions about 5 nm in size and that the grain size of the Nb{sub 3}Sn is about 20-25 nm for samples heat treated at 700 C for up to eight hours.

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  • ICMC '97, Portland, OR, July 28-August 1, 1997

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  • Report No.: LBNL-39898
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 1011369
  • Archival Resource Key: ark:/67531/metadc834092

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  • July 1, 1997

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  • May 19, 2016, 3:16 p.m.

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  • June 16, 2016, 12:38 p.m.

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Dietderich, D.R.; Kelman, M.; Litty, J.R. & Scanlan, R.M. High Critical Current Densities in Nb3Sn Films with Engineered Microstructures--Artifical Pinning Microstructures, article, July 1, 1997; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc834092/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.