Inelastic neutron scattering study of crystal field excitations ofNd3+in NdFeAsO

2013/09/27 by Y. Xiao, Ye Xiao, Mohamed Zbiri +8
Materials Science · Physics and Astronomy · #Antiferromagnetism #Computer science #Condensed matter physics #Crystal (programming language) #Inelastic neutron scattering #Inelastic scattering #Iron-based superconductors research #Optics #Physics #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #Scattering #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.88.214419

published as Phys. Rev. B 88, 214419 (2013) · 5 pages, 4 figures

arxiv created 2013/09/27 · openalex publication_date 2013/12/19 · arxiv updated 2014/01/08 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Inelastic neutron scattering experiments were performed to investigate the crystalline electric field (CEF) excitations of Nd³⁺ (J = 9/2) in the iron pnictide NdFeAsO. The crystal field level structures for both the high-temperature paramagnetic phase and the low-temperature antiferromagnetic phase of NdFeAsO are constructed. The variation of CEF excitations of Nd³⁺ reflects not only the change of local symmetry but also the change of magnetic ordered state of the Fe sublattice. By analyzing the crystal field interaction with a crystal field Hamiltonian, the crystal field parameters are obtained. It was found that the sign of the fourth- and sixth-order crystal field parameters change upon the magnetic phase transition at \ensuremath∼140 K, which may be due to the variation of exchange interactions between the 4f and conduction electrons.

Citations

• Phonon Density of States ofLaFeAsO1−xFx
• Crystalline Electric Field as a Probe for Long-Range Antiferromagnetic Order and Superconducting State ofCeFeAsO1−xFx
• Crystal Structure and Antiferromagnetic Order inNdFeAsO1−xFx(x=0.0and 0.2) Superconducting Compounds from Neutron Diffraction Measurements
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• Effect of Structural Parameters on Superconductivity in Fluorine-Free LnFeAsO1-y (Ln = La, Nd)
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• Superconductivity in the iron-based F-doped layered quaternary compound Nd[O 1 − x F x ]FeAs