Microstructure of Cu- and Y-rich YBa2Cu3O7-x thin films: Identification of the CuYO2 phase
Creators
- 1. Stanford University, Stanford, CA (USA). Department of Applied Physics
- 2. Stanford University, Stanford, CA (USA). Center for Materials Research
Description
The CuYO2 delafossite-type structure has been identified as a second phase in thin films of Cu- and Y-rich YBa2Cu3O7-x (123) made by electron beam co-evaporation at conditions of low oxygen pressure; this phase occurs as extremely small, densely distributed, highly oriented precipitates within the 123 matrix. The smallest (sub-100 A) [00.1] oriented precipitates of this hexagonal phase are strained to give a better lattice match to the surrounding 123 structure. The results suggest that, for thin film deposition conditions of sufficiently low temperature and pressure, there may be a tie line between YBa2Cu3O7-x and CuYO2 in the equilibrium phase diagram. The size and distribution of the precipitates is such as would be expected to influence structurally sensitive superconducting transport properties
Additional details
Publishing Information
- Journal Title
- Applied Physics Letters
- Journal Volume
- 57
- Journal Issue
- 11
- Series
- Appl. Phys. Lett.
- Journal Page Range
- 1158-1160
- ISSN
- 0003-6951
- CODEN
- APPLA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 22015422
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- BARIUM OXIDES; COPPER OXIDES; CRYSTAL DEFECTS; HIGH-TC SUPERCONDUCTORS; MICROSTRUCTURE; SUPERCONDUCTING FILMS; SUPERCONDUCTIVITY; TRANSMISSION ELECTRON MICROSCO; VACUUM EVAPORATION; YTTRIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTAL STRUCTURE; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ELECTRON MICROSCOPY; EVAPORATION; FILMS; MICROSCOPY; OXIDES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; PHYSICAL PROPERTIES; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS