B Joseph et al 2009 J. Phys.: Condens. Matter 21 432201 doi:10.1088/0953-8984/21/43/432201
RE L3 x-ray absorption study of REO1−xFxFeAs (RE = La, Pr, Nd, Sm) oxypnictides
FREE ARTICLEB Joseph1, A Iadecola1, M Fratini2, A Bianconi1, A Marcelli3 and N L Saini1
Show affiliationsFAST TRACK COMMUNICATION
Rare earth L3-edge x-ray absorption near-edge structure (XANES) spectroscopy has been used to study REOFeAs (RE = La, Pr, Nd, Sm) oxypnictides. The Nd L3 XANES due to the 
transition shows a substantial change in both white line (WL) spectral weight and the higher energy multiple scattering resonances with the partial substitution of O by F. A systematic change in the XANES features is seen due to varying lattice parameters with ionic radius of the rare earth. On the other hand, we hardly see any change across the structural phase transition. The results provide timely information on the local atomic correlations showing the importance of the local structural chemistry of the REO spacer layer and interlayer coupling in the competing superconductivity and itinerant striped magnetic phase of the oxypnictides.
- PACS
-
78.70.Dm X-ray absorption spectra
74.72.-h Cuprate superconductors (high-Tc and insulating parent compounds)
- Subjects
- Dates
-
Issue 43 (28 October 2009)
Received 4 August 2009, in final form 22 September 2009
Published 8 October 2009
-
RE L3 x-ray absorption study of REO1−xFxFeAs (RE = La, Pr, Nd, Sm) oxypnictides
B Joseph et al 2009 J. Phys.: Condens. Matter 21 432201
-
Intricate coupling between ion–ion and ion–surface correlations in double layers as illustrated by charge inversion—combined effects of strong Coulomb correlations and excluded volume
Roland Kjellander 2009 J. Phys.: Condens. Matter 21 424101
-
The uniaxially aperiodic structure of a thin Cu film on fivefold i-Al–Pd–Mn
K Pussi et al 2009 J. Phys.: Condens. Matter 21 474213
-
Magnetic field induced ferroelectric to relaxor crossover in Tb1−xCaxMnO3
N Mufti et al 2009 J. Phys.: Condens. Matter 21 452203
-
Multilayered crystals of macroions under slit confinement
E C Oğuz et al 2009 J. Phys.: Condens. Matter 21 424110
-
Stability and mode analysis of solar low-coronal structures using irreversible energy principles
Andrea Costa 2008 Phys. Scr. 2008 014047
-
Making tracks: electronic excitation roles in forming swift heavy ion tracks
N Itoh et al 2009 J. Phys.: Condens. Matter 21 474205
-
Rare earth magnetism in CeFeAsO: a single crystal study
A Jesche et al 2009 New J. Phys. 11 103050
-
Non-collinearity and spin frustration in the itinerant kagome ferromagnet Fe3Sn2
L A Fenner et al 2009 J. Phys.: Condens. Matter 21 452202
-
Metallic glasses: viable tool materials for the production of surface microstructures in amorphous polymers by micro-hot-embossing
David L Henann et al 2009 J. Micromech. Microeng. 19 115030
Users also read
What's this?- Internal current measurements in high power impulse magnetron sputtering
- Raman spectroscopy of highly oriented FeSe0.5Te0.5 superconductor
- Scattering from highly packed disordered colloids