Doping and Temperature Dependence of Raman Scattering of NdFeAsO1-xFx (x=0.0, 0.1, 0.2) Superconductor

Abstract

Raman spectra of polycrystalline NdFeAsO1-xFx (x=0.0, 0.1, 0.2) compound have been systematically investigated as functions of temperature and fluorine concentration. Scanning electron microscopic and Raman microscopic characterization demonstrates that the polycrystalline samples mainly contain two phases, i.e. superconductor NdFeAsO1-xFx compound and a MnP-type FeAs phase, with dissimilar characteristic Raman bands. It was found that fluorine doping leads to structure disorder in the insulator Nd-O layers and high temperature coefficient of Fe-As vibrational mode.

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Cited by in corpus (11)

• Anomalous Raman scattering from phonons and electrons of superconducting FeSe${}_{0.82}$
• Optical and Raman spectroscopy studies on Fe-based superconductors
• Formation of partial energy gap below the structural phase transition and the rare-earth element substitution effect on infrared phonons in ReFeAsO (Re=La, Nd, and Sm)
• Raman Scattering Study of the Lattice Dynamics of Superconducting LiFeAs
• Soft and Isotropic Phonons in PrFeAsO_{1-y}
• Spin dependent electron-phonon interaction in SmFeAsO by low-temperature Raman spectroscopy
• Temperature dependent local structure of NdFeAsO1-xFx system using arsenic K-edge extended x-ray absorption fine structure
• Raman scattering investigation of superconducting Ba${}_2$Ti${}_2$Fe${}_2$As${}_4$O
• Chemical tuning of a honeycomb magnet through a critical point
• Small influence of magnetic ordering on lattice dynamics in TaFe${}_{1.25}$Te${}_3$
• Fluorine-substitution-dependent phase diagram and superconducting properties of Sm-based oxypnictides synthesized by a high-pressure growth technique