Epitaxial Y sub 1 Ba sub 2 Cu sub 3 O sub 7 thin films on CeO sub 2 buffer layers on sapphire substrates

Journal Article · Tue Oct 01 04:00:00 EDT 1991 · Journal of Applied Physics; (United States)

DOI:https://doi.org/10.1063/1.349166· OSTI ID:5294040

Denhoff, M W; McCaffrey, J P ^[1]

---

1. National Research Council of Canada, Ottawa (Canada)

Pulsed laser deposition has been used to deposit Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub 7} layer on CeO{sub 2} buffer layers on (1102) sapphire. Both layers are epitaxial with the {l angle}110{r angle} direction of the CeO{sub 2} layer aligned with the {l angle}2021{r angle} direction of the sapphire substrate. The {ital c}-axis Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub 7} layer has its {l angle}100{r angle} direction alligned with the {l angle}110{r angle} direction of the CeO{sub 2}. Cross-sectional transmission electron microscopy shows the epitaxy to be coherent and the interfaces to be abrupt at an atomic level. The best films have a critical current of 9 {times} 10{sup 6} A/cm{sup 2} at 4.2 K and lower microwave surface resistance than copper at 77 K and at a frequency of 31 GHz.

• OSTI ID: 5294040
• Journal Information: Journal of Applied Physics; (United States), Journal Name: Journal of Applied Physics; (United States) Vol. 70:7; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
AMINES
AMMONIUM COMPOUNDS
BARIUM COMPOUNDS
COPPER COMPOUNDS
CRITICAL CURRENT
CUPRATES
CURRENTS
DEPOSITION
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELECTRON MICROSCOPY
EPITAXY
FREQUENCY RANGE
GHZ RANGE
GHZ RANGE 01-100
HIGH-TC SUPERCONDUCTORS
LASER RADIATION
LOW TEMPERATURE
MICROSCOPY
MICROWAVE RADIATION
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUATERNARY COMPOUNDS
RADIATIONS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
ULTRALOW TEMPERATURE
YTTRIUM COMPOUNDS