skip to main content

SciTech ConnectSciTech Connect

Title: Influence of oxygen pressure and aging on LaAlO{sub 3} films grown by pulsed laser deposition on SrTiO{sub 3} substrates

The crystal structures of LaAlO{sub 3} films grown by pulsed laser deposition on SrTiO{sub 3} substrates at oxygen pressure of 10{sup −3} millibars or 10{sup −5} millibars, where kinetics of ablated species hardly depend on oxygen background pressure, are compared. Our results show that the interface between LaAlO{sub 3} and SrTiO{sub 3} is sharper when the oxygen pressure is lower. Over time, the formation of various crystalline phases is observed while the crystalline thickness of the LaAlO{sub 3} layer remains unchanged. X-ray scattering as well as atomic force microscopy measurements indicate three-dimensional growth of such phases, which appear to be fed from an amorphous capping layer present in as-grown samples.
Authors:
;  [1] ;  [1] ;  [2] ; ;  [3] ;  [4]
  1. London Centre for Nanotechnology, University College London, London WC1H 0AH (United Kingdom)
  2. (United Kingdom)
  3. Division of Physics and Applied Physics, Nanyang Technological University, Singapore 637371 (Singapore)
  4. Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900 (Saudi Arabia)
Publication Date:
OSTI Identifier:
22293096
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINATES; ATOMIC FORCE MICROSCOPY; CRYSTAL GROWTH; CRYSTAL STRUCTURE; ENERGY BEAM DEPOSITION; INTERFACES; LANTHANUM COMPOUNDS; LASER RADIATION; OXYGEN; PULSED IRRADIATION; STRONTIUM TITANATES; THIN FILMS; X-RAY DIFFRACTION