Applied Physics Letters · 2008 · 37 citations · 20 references
Natural SciencesMaterials SciencePhysicsMagnetic MaterialsSolid State PhysicsThin FilmsFerromagnetic MaterialsFerromagnetismMagnetic OxidesMagnetic Properties Of SolidsMagnetism In SolidsThin Film Magnetic PropertiesEpitaxial Thin FilmsLow-temperature GrowthPulsed Laser DepositionSuperexchangeSuperexchange MechanismTemperature-dependent GrowthX-ray Diffraction Analysis
Growth and properties of epitaxial BaFeO3 thin films in the metastable cubic perovskite phase are examined. BaFeO3 films were grown on (012) LaAlO3 and (001) SrTiO3 single crystal substrates by pulsed-laser deposition. X-ray diffraction shows that films grown between 650 and 850°C yield an oxygen-deficient BaFeO2.5+x pseudocubic perovskite phase that decreases in lattice spacing with increasing growth temperature. Magnetization measurements on as-deposited BaFeO3 films indicate weakly ferromagnetic behavior. Annealing in 1atm oxygen ambient converts them into conductive and robustly ferromagnetic pseudocubic BaFeO3 phase with TC=235K. Observation of ferromagnetism with increasing oxygen content is consistent with superexchange coupling of Fe+4–O–Fe+4.
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Multiferroic BaTiO <sub>3</sub> -CoFe <sub>2</sub> O <sub>4</sub> Nanostructures
Haimei Zheng, Junling Wang, S. E. Lofland et al. · Science · 2004 · 2.2K citations
Natural Sciences, Materials Engineering, Materials Science +17
Synthesis of Novel Thin-Film Materials by Pulsed Laser Deposition
D. H. Lowndes, David B. Geohegan, Alexander A. Puretzky et al. · Science · 1996 · 634 citations
Natural Sciences, Materials Engineering, Materials Science +15