In situ growth of superconducting NdFeAs(O,F) thin films by molecular beam epitaxy

Journal Article · Mon Jul 26 00:00:00 EDT 2010 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3464171· OSTI ID:21367028

Kawaguchi, T; Uemura, H; Ohno, T; Ujihara, T; Takenaka, K; Takeda, Y; Ikuta, H ^[1]; Tabuchi, M ^[2]

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1. Department of Crystalline Materials Science, Nagoya University, Chikusa-ku, Nagoya 464-8603 (Japan)
2. Venture Business Laboratory (VBL), Nagoya University, Chikusa-ku, Nagoya 464-8603 (Japan)

Superconducting NdFeAs(O,F) thin films were grown on GaAs substrates by molecular beam epitaxy. Films grown with a sufficiently long growth time exhibited a clear superconducting transition with an onset temperature up to 48 K and zero resistance temperature up to 42 K without the need of an ex situ annealing process. Electron probe microanalysis and Hall coefficient measurements indicated that the superconducting films are doped with fluorine, and depth-profile analysis by Auger electron spectroscopy revealed the formation of a NdOF layer near the surface, which is probably connected with the fluorine doping.

• OSTI ID: 21367028
• Journal Information: Applied Physics Letters, Vol. 97, Issue 4; Other Information: DOI: 10.1063/1.3464171; (c) 2010 American Institute of Physics; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
AUGER ELECTRON SPECTROSCOPY
CRYSTAL GROWTH
DOPED MATERIALS
ELECTRON MICROPROBE ANALYSIS
ELECTRON PROBES
FLUORINE
GALLIUM ARSENIDES
HALL EFFECT
HIGH-TC SUPERCONDUCTORS
IRON COMPOUNDS
LAYERS
MOLECULAR BEAM EPITAXY
NEODYMIUM COMPOUNDS
SUBSTRATES
SUPERCONDUCTING FILMS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0013-0065 K
THIN FILMS
TRANSITION TEMPERATURE
ARSENIC COMPOUNDS
ARSENIDES
CHEMICAL ANALYSIS
CRYSTAL GROWTH METHODS
ELECTRON SPECTROSCOPY
ELEMENTS
EPITAXY
FILMS
GALLIUM COMPOUNDS
HALOGENS
HEAT TREATMENTS
MATERIALS
MICROANALYSIS
NONDESTRUCTIVE ANALYSIS
NONMETALS
PHYSICAL PROPERTIES
PNICTIDES
PROBES
RARE EARTH COMPOUNDS
SPECTROSCOPY
SUPERCONDUCTORS
TEMPERATURE RANGE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TYPE-II SUPERCONDUCTORS