Rf performance of polycrystalline high-T sub c superconductors

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5733226

Bohn, C L; Delayen, J R; Roche, C T

We have measured the rf properties of bulk and thick-film high-T{sub c} superconductors as functions of temperature, frequency, and rf field amplitude. The rf surface resistance typically depended strongly on field amplitude, but the samples remained superconducting up to the highest fields we could apply ({approximately}640 gauss). For example, at 220 MHz, the surface resistance of a bulk polycrystalline YBa{sub 2}Cu{sub 3}O{sub 7{minus}x} sample ranged from {approx lt}2{mu}{Omega} at {approx lt}0.05 gauss and 4.2 K to 6.3 m{Omega} at 640 gauss and 77 K. The stability of the rf properties of this sample after storage both in air and in vacuum was also investigated. 20 refs., 6 figs., 1 tab.

• Research Organization: Argonne National Lab., IL (USA)
• Sponsoring Organization: DOE/CE
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5733226
• Report Number(s): CONF-8908145-1; ON: DE89017671
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FILMS
LEAD COMPOUNDS
LEAD OXIDES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYCRYSTALS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUBSTRATES
SUPERCONDUCTORS
SURFACE PROPERTIES
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES