Crystal distortion associated with ortho-tetra transition of REBa 2Cu3Ox films

M. Mukaida, M. Miura, A. Ichinose, S. Horii, K. Matsumoto, Y. Yoshida, K. Koike, Y. Takahashi, A. Saito, S. Ohshima

Research output: Contribution to journalConference articlepeer-review

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 languageEnglish
Pages (from-to)1010-1014
Number of pages5
JournalPhysica C: Superconductivity and its applications
Volume426-431
Issue numberII
DOIs
Publication statusPublished - Oct 6 2005
Externally publishedYes
EventProceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity -
Duration: Nov 23 2004Nov 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

Fingerprint Dive into the research topics of 'Crystal distortion associated with ortho-tetra transition of REBa <sub>2</sub>Cu<sub>3</sub>O<sub>x</sub> films'. Together they form a unique fingerprint.

Cite this