High critical current densities in epitaxial YBa sub 2 Cu sub 3 O sub 7 minus. delta. thin films on silicon-on-sapphire

Journal Article · Mon May 27 04:00:00 EDT 1991 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.104864· OSTI ID:5622733

Fork, D K ^[1]; Ponce, F A; Tramontana, J C ^[2]; Newman, N ^[3]; Phillips, J M ^[4]; Geballe, T H ^[1]

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1. Department of Applied Physics, Stanford University, Stanford, California 94305 (USA)
2. Xerox Palo Alto Research Center, Palo Alto, California 94304 (USA)
3. Conductus, Inc., Sunnyvale, California 94086 (USA)
4. AT T Bell Laboratories, Murry Hill, New Jersey 07974 (USA)

The use of silicon on sapphire (SOS) as a substrate for YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} allows the growth of thick ({similar to}4000 A) films without the thermally induced cracking characteristic of epitaxial films on bulk Si substrate. Epitaxy is sustained and reaction is prevented by an intermediate buffer layer of yttria-stabilized (YSZ). The transport critical current density is as high as 4.6{times}10{sup 6} A/cm{sup 2} at 77 K, and surface resistance measurements at 4.2 K are reported. Microtwin propagation from Si into YSZ is shown not to occur.

• OSTI ID: 5622733
• Journal Information: Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 58:21; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CORUNDUM
CRITICAL CURRENT
CURRENTS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELEMENTS
EPITAXY
FILMS
HIGH-TC SUPERCONDUCTORS
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SAPPHIRE
SEMIMETALS
SILICON
SUBSTRATES
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
VAPOR PHASE EPITAXY
YTTRIUM COMPOUNDS
YTTRIUM OXIDES