Abstract
Microstructure deformation has been investigated for EuBa 2Cu3Ox films associated with orthorhombic-tetragonal transition during cooling in an oxygen atmosphere. EuBa2Cu3Ox films have been grown by a pulsed laser deposition technique under 1000 mTorr oxygen pressure and 800 °C substrate temperature. After the growth, the films are cooled to 400 °C and annealed in one atom oxygen pressure for 0-110 h. The preferred orientation of the films is characterized by X-ray diffraction and φ-scan X-ray diffraction. Microstructures and lattice images of the EuBa2Cu 3Ox films are observed by a transmission electron microscope. All of the obtained EuBa2Cu3Ox films are c-axis oriented. The φ-scan X-ray diffraction revealed that films without any 500 °C annealing have a tetragonal structure. However, more than 3 h annealed films are partly orthorhombic from the peak separation in the φ-scan. The angle between the two peaks is about 0.8°. We estimate the a-axis length/b-axis length ratio (orthorhombicity) from the angle between the separated peaks to be 0.866°. It agrees with the a-axis length/b-axis length ratio of well oxidized EuBa2Cu3Ox bulk materials.
Original language | English |
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Pages (from-to) | 1010-1014 |
Number of pages | 5 |
Journal | Physica C: Superconductivity and its applications |
Volume | 426-431 |
Issue number | II |
DOIs | |
Publication status | Published - Oct 6 2005 |
Externally published | Yes |
Event | Proceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity - Duration: Nov 23 2004 → Nov 25 2004 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering