Japanese Journal of Applied Physics · 2009 · 12 citations · 9 references
Natural SciencesMaterials EngineeringMaterials ScienceMagnetic MaterialsSurface ScienceThin FilmsAntiferromagnetismEpitaxial GrowthFerromagnetic MaterialsFerromagnetismMagnetic OxidesThin Film Magnetic PropertiesAntiferromagnetic OrderAntiferromagnetic OrderingLayer-by-layer GrowthMagnetic PropertiesNeel TemperatureNéel TemperaturePulsed Laser DepositionReflection High-energy Electron Diffraction
We have fabricated high-quality epitaxial EuTiO3(100) films on SrTiO3 substrates by pulsed laser deposition. In situ reflection high-energy electron diffraction (RHEED) monitoring revealed clear intensity oscillation, indicating layer-by-layer growth of EuTiO3. Furthermore, the obtained films had atomically flat surfaces with a step-terrace structure. From magnetization vs temperature measurements, we confirmed that the EuTiO3 films have antiferromagnetic ordering with a Néel temperature of 3.7 K, and that they could be transformed to a ferromagnetic state by applying a magnetic field. We also found that the magnetic properties of the EuTiO3 films are sensitive to cell volume, as predicted by recent first-principles band calculations.
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