NDLI: Nanometer Cerium: A Significant Improvement Over Platinum in Bulk YBCO Superconductor

Content Provider	IEEE Xplore Digital Library
Author	Sawh, R.-P. Weinstein, R. Parks, D. Obot, V.
Copyright Year	2002
Abstract	Large grain YBCO superconductors, containing the same atomic percentage of Ce, and that of Pt, were produced via the melt-texturing process. Samples doped with nanometer cerium oxide exhibits an approximate 30% increase in trapped magnetic flux density, relative to submicrometer platinum doped YBCO. A 30% increase in trapped magnetic flux density represents ~ 80% increase in critical current density. Microstructure studies indicate that just like Pt, Ce refines Y211 particles to increase trapped magnetic flux density and critical current density. Cerium is much cheaper than platinum and is therefore, a desirable alternative to Pt in the large-scale production of bulk YBCO superconductors. Another interesting result of this experiment is that the trapped magnetic flux density of Ce-doped samples is unchanging over a large range of melting temperatures used for melt-texturing. In addition to refined Y211, Ce-rich deposits are also formed. The Ce-rich particles are insufficient in number to act as effective pinning centers.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	2941
Ending Page	2944
Page Count	4
File Size	1022477
File Format	PDF
ISSN	10518223
Volume Number	19
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cerium Platinum Yttrium barium copper oxide High temperature superconductors Magnetic flux density Critical current density Doping Chemicals Large-scale systems Production submicrometer platinum doping Enhancement in critical current density melt-textured high temperature superconductors nanometer cerium oxide doping
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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