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Title: The effects of oxygen pressure on disordering and magneto-transport properties of Ba{sub 2}FeMoO{sub 6} thin films grown via pulsed laser deposition

Epitaxial Ba{sub 2}FeMoO{sub 6} thin films were grown via pulsed laser deposition under low oxygen pressure and their structural, chemical, and magnetic properties were examined, focusing on the effects of oxygen pressure. The chemical disorder, off-stoichiometry in B site cations (Fe and Mo) increased with increasing oxygen pressure and thus magnetic properties were degraded. Interestingly, in contrast, negative magneto-resistance, which is the characteristics of this double perovskite material, was enhanced with increasing oxygen pressure. It is believed that phase segregation of highly disordered thin films is responsible for the increased magneto-resistance of thin films grown at high oxygen pressure. The anomalous Hall effect, which behaves hole-like, was also observed due to spin-polarized itinerant electrons under low magnetic field below 1‚ÄČT and the ordinary electron-like Hall effect was dominant at higher magnetic fields.
Authors:
; ; ;  [1] ; ; ;  [2]
  1. Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611 (United States)
  2. Department of Physics, University of Florida, Gainesville, Florida 32611 (United States)
Publication Date:
OSTI Identifier:
22489525
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 3; Other Information: (c) 2015 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; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CATIONS; ENERGY BEAM DEPOSITION; EPITAXY; HALL EFFECT; LASER RADIATION; MAGNETIC FIELDS; MAGNETIC PROPERTIES; MAGNETORESISTANCE; OXYGEN; PEROVSKITE; PULSED IRRADIATION; SEGREGATION; SPIN ORIENTATION; STOICHIOMETRY; THIN FILMS