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Title: The effect of interface oxygen content on magnetoelectric effect of epitaxial La{sub 0.7}Sr{sub 0.3}MnO{sub 3}/BaTiO{sub 3} bilayer

The epitaxial La{sub 0.7}Sr{sub 0.3}MnO{sub 3}/BaTiO{sub 3} (LSMO/BTO) bilayer films are grown on (001) oriented LaAlO{sub 3} substrate by pulsed laser deposition technique. The oxygen-rich interface is obtained through in-situ annealing process in oxygen, and the oxygen-deficient interface is obtained without the annealing process. The results show that the ferromagnetic properties of the LSMO film and the magnetoelectric effect (ME) of the bilayer films strongly correlate to the oxygen content at the interface of LSMO/BTO. The saturated magnetization and the ME voltage coefficient of the oxygen-rich bilayer film are higher than that of oxygen-deficient one. It suggests a more effective ME coupling at the LSMO/BTO interface, which are generated through not only the interface strain but also the spin polarized carriers.
Authors:
 [1] ;  [2]
  1. College of Physics and Electrical Engineering, Anyang Normal University, Anyang 455002 (China)
  2. National Engineering Research Central for Rare Earth Materials, General Research Institute for Nonferrous Metals, The Grirem Advanced materials Co. Ltd., Beijing 100088 (China)
Publication Date:
OSTI Identifier:
22275594
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 4; 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; ANNEALING; BARIUM COMPOUNDS; COUPLING; ELECTRICAL PROPERTIES; ENERGY BEAM DEPOSITION; EPITAXY; INTERFACES; LANTHANUM COMPOUNDS; LASER RADIATION; LAYERS; MAGNETIC PROPERTIES; MAGNETIZATION; MANGANATES; OXYGEN; PULSED IRRADIATION; SPIN ORIENTATION; STRONTIUM COMPOUNDS; THIN FILMS; TITANATES