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Title: High-quality EuO thin films the easy way via topotactic transformation

Epitaxy is widely employed to create highly oriented crystalline films. A less appreciated, but nonetheless powerful means of creating such films is via topotactic transformation, in which a chemical reaction transforms a single crystal of one phase into a single crystal of a different phase, which inherits its orientation from the original crystal. Topotactic reactions may be applied to epitactic films to substitute, add or remove ions to yield epitactic films of different phases. Here we exploit a topotactic reduction reaction to provide a non-ultra-high vacuum (UHV) means of growing highly oriented single crystalline thin films of the easily over-oxidized half-metallic semiconductor europium monoxide (EuO) with a perfection rivalling that of the best films of the same material grown by molecular-beam epitaxy or UHV pulsed-laser deposition. Lastly, as the technique only requires high-vacuum deposition equipment, it has the potential to drastically improve the accessibility of high-quality single crystalline films of EuO as well as other difficult-to-synthesize compounds.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8]
  1. Univ. Augsburg, Augsburg (Germany). Center for Electronic Correlations and Magnetism
  2. Cornell Univ., Ithaca, NY (United States). School of Applied and Engineering Physics
  3. Cornell Univ., Ithaca, NY (United States). Dept. of Materials Science and Engineering
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
  5. Peter Grunberg Institute, Julich (Germany). JARA-FIT, Research Centre
  6. Cornell Univ., Ithaca, NY (United States). School of Applied and Engineering Physics; Kavli Institute at Cornell for Nanoscale Science, Ithaca, NY (United States)
  7. Cornell Univ., Ithaca, NY (United States). Dept. of Materials Science and Engineering; Kavli Institute at Cornell for Nanoscale Science, Ithaca, NY (United States)
  8. Univ. Augsburg, Augsburg (Germany). Center for Electronic Correlations and Magnetism
Publication Date:
OSTI Identifier:
1259679
Grant/Contract Number:
SC0002334; DMR-1120296; FA9550-10-1-0123
Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 6; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE