A Method For Simultaneously Enhancing The Transition Temperature And Increasing Mechanical Strength Of Yttrium Barium Copper Oxide (YBa2Cu4O8).

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Abstract:

Y124 can be heated to 850 deg C without serious O2 loss, and also Y123 loses O2 from its structure at temperatures above 400 deg C. Partial substitution of Ca for Y and of Li for Cu raised the transition temperature Tc and enhanced sintering in Y1 Ba2Cu4O8. We measured the critical temperature by two methods a microwave technique RF which measures the surface resistivity at 35 GHz, and an AC technique which measures the magnetic screening provided by the whole sample. Twelve samples of Y124 or Y1-zCazBa2Cu4-xLixO8 were prepared a summary is presented. It is desirable to have a thin film of Y124 for device applications we have not been successful at this endeavor. jg

Author(s):
Finnegan, Robert D. ; Tauber, Arthur ; Tidrow, Steven C. ; Wilber, William D. ; Leupold, Herbert A. ; Domath-mohr, Michelle M.
Author Organization(s):
ARMY RESEARCH LAB FORT MONMOUTH NJ
Descriptive Note:
Technical rept. Jun 92-May 94,
Pagination:
0012

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Monitor Series:
ARL****
 Subject Terms
Joint Capability Areas:
JCA_7.2.1_Mitigate Lethal Effects; JCA_7.2_Mitigate; JCA_7_Protection; JCA_5_Command and Control
Modernization Areas:
Directed Energy
Communities of Interest:
Advanced Electronics
Descriptor(s):
*MECHANICAL PROPERTIES, *TRANSITION TEMPERATURE, *BARIUM, *YTTRIUM, CALCIUM, MAGNETIC FIELDS, HIGH VELOCITY, RESISTANCE, THIN FILMS, MICROWAVES, ALTERNATING CURRENT, ELECTRICAL CONDUCTIVITY, STRENGTH(MECHANICS), CRITICAL TEMPERATURE, SURFACES, OXYGEN, LITHIUM, CIRCUITS, HIGH TEMPERATURE SUPERCONDUCTORS, SINTERING
Field(s)/Group(s):
Inorganic Chemistry, Physical Chemistry, Electricity and Magnetism, Thermodynamics
Keyword(s):
YTTRIUM BARIUM COPPER OXIDE
Report Date:
1995 Apr 01