Pulsed Laser Deposition of High Tc Superconducting Thin Films

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Abstract:

Superconducting thin films have been deposited in-situ on several substrate materials using pulsed excimer laser deposition. The major accomplishments were in four separate areas 1 We were the first to grow excellent quality YBa2Cu3O7 on Si and on silicon-on-sapphire. The quality of these films has enabled several applications and other studies to be realized. These include infrared detectors and superconducting metal-insulator-semiconductor structures, as well as flux motion studies. 2 We were the first to grow excellent quality YBCO on GaAs. This success allows superconductors to be combined with high-speed GaAs for future device applications. 3 We were the first to grow a-axis oriented YBCO films using monolayer buffers of PrO2. This structural orientation favors technical applications, such as, Josephson devices or tunnel junctions. 4 We were the first to observe an extreme sensitivity of T sub c to cool-down rate for epitaxial Fe-doped YBCO films. These results not only may yield information on the role of the Cu-O chains and planes in the superconductivity of this material but also may lead to procedures to increase the flux pinning.

Author(s):
Boyce, J. B. ; Connell, G. A.
Author Organization(s):
XEROX PALO ALTO RESEARCH CENTER CA
Descriptive Note:
Final rept.,
Pagination:
0156

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFOSR-TR-92-0345
Contract/Grant Number(s):
F49620-90-C-0069
Task Number(s):
C1
Project Number(s):
2306
Monitor Series:
TR-92-0345, AFOSR
 Subject Terms
Joint Capability Areas:
JCA_1.2.3_Educating; JCA_4.6_Engineering; JCA_4.6.1_General Engineering; JCA_5_Command and Control; JCA_2.2.2_Imagery Collection; JCA_2.2_Collection; JCA_5.3_Planning; JCA_5.6.1_Assess Compliance with Guidance; JCA_5.6_Monitor; JCA_1.2.7_Experimentation; JCA_JCA_4.1.2_Sustain the Force; JCA_4.1_Deployment and Distribution; JCA_1.2.5_Lessons Learned; JCA_1.3.2_Personnel Management; JCA_1.2.1_Training; JCA_1.2.6_Concepts; JCA_5.2.2_Develop Knowledge and Situational Awareness; JCA_5.2_Understand
Modernization Areas:
Microelectronics; Directed Energy
Communities of Interest:
Advanced Electronics
Descriptor(s):
*PULSED LASERS, *SUPERCONDUCTORS, *DEPOSITION, DETECTORS, MATERIALS, GALLIUM ARSENIDES, TUNNELING(ELECTRONICS), STRUCTURES, THIN FILMS, FILMS, MOTION, RATES, SUBSTRATES, SEMICONDUCTORS, LASERS, SENSITIVITY, TUNNELS, SAPPHIRE, QUALITY, SILICON, CHAINS, YIELD, INFRARED DETECTORS, JOSEPHSON JUNCTIONS, EXCIMERS, METALS, SUPERCONDUCTIVITY, VELOCITY, BUFFERS
Field(s)/Group(s):
Lasers and Masers, Electricity and Magnetism
Keyword(s):
*HIGH TEMPERATURE SUPERCONDUCTORS, LASER DEPOSITION, YTTRIUM BARIUM COPPER OXIDE, APPLICATIONS, PRASEDYMIUM OXIDE, FLUX PINNING, PE61102F, WUAFOSR2306C1
Report Date:
1992 Apr 15