skip to main content

SciTech ConnectSciTech Connect

Title: Epitaxial growth and properties of La{sub 0.7}Sr{sub 0.3}MnO{sub 3} thin films with micrometer wide atomic terraces

La{sub 0.7}Sr{sub 0.3}MnO{sub 3} (LSMO) films with extraordinarily wide atomic terraces are epitaxially grown on SrTiO{sub 3} (100) substrates by pulsed laser deposition. Atomic force microscopy measurements on the LSMO films show that the atomic step is ∼4 Å and the atomic terrace width is more than 2 μm. For a 20 monolayers (MLs) LSMO film, the magnetization is determined to be 255 ± 15 emu/cm{sup 3} at room temperature, corresponding to 1.70 ± 0.11 μ{sub B} per Mn atom. As the thickness of LSMO increases from 8 MLs to 20 MLs, the critical thickness for the temperature dependent insulator-to-metal behavior transition is shown to be 9 MLs. Furthermore, post-annealing in oxygen environment improves the electron transport and magnetic properties of the LSMO films.
Authors:
; ; ;  [1] ; ;  [2] ;  [1] ;  [3]
  1. International Center for Quantum Materials, Peking University, Beijing 100871 (China)
  2. Department of Physics and Astronomy, University of California, Riverside, California 92521 (United States)
  3. (China)
Publication Date:
OSTI Identifier:
22483190
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANNEALING; ATOMIC FORCE MICROSCOPY; ENERGY BEAM DEPOSITION; EPITAXY; LASER RADIATION; MAGNETIC PROPERTIES; MAGNETIZATION; PULSED IRRADIATION; STRONTIUM TITANATES; SUBSTRATES; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0273-0400 K; THICKNESS; THIN FILMS