Epitaxial Growth of NdFeAsO Thin Films by Molecular Beam Epitaxy

Details Epitaxial Growth of NdFeAsO Thin Films by Molecular Beam Epitaxy Epitaxial Growth of NdFeAsO Thin Films by Molecular Beam Epitaxy

2009-07-17

arxiv.org/abs/0907.3108v1

Appl. Phys. Express 2, 093002 (2009)

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1143/APEX.2.093002

Epitaxial films of NdFeAsO were grown on GaAs substrates by molecular beam epitaxy (MBE). All elements including oxygen were supplied from solid sources using Knudsen cells. The x-ray diffraction pattern of the film prepared with the optimum growth condition showed no indication of impurity phases. Only (00l) peaks were observed, indicating that NdFeAsO was grown with the c-axis perpendicular to the substrate. The window of optimum growth condition was very narrow, but the NdFeAsO phase was grown with a very good reproducibility. Despite the absence of any appreciable secondary phase, the resistivity showed an increase with decreasing temperature.

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