Energy-dispersive X-ray absorption spectroscopy at LNLS: investigation on strongly correlated metal oxides

Julio C. Cezar (1) , Narcizo M. Souza-Neto (1) , Cinthia Piamonteze (1) , Edilson Tamura (1) , Flavio Garcia (1) , Edson J. Carvalho (1) , Régis T. Neueschwander (1) , Aline Y. Ramos (2) , Hélio C. N. Tolentino (3) , Alberto Caneiro (4, 5) , Nestor E. Massa (6) , Maria Jesus Martinez-Lope (7) , Jose Antonio Alonso (7) , Jean-Paul Itié (8)

1 LNLS - Laboratório Nacional de Luz Sìncrotron
2 NEEL - MRS - Matériaux, Rayonnements, Structure
3 NEEL - CRG - CRG & Grands instruments
4 Centro Atómico Bariloche [Argentine]
5 Instituto Balseiro [Bariloche]
6 Laboratorio Nacional de Investigacion y Servicios en Espectroscopia Optica [La Plata]
7 ICMM - Instituto de Ciencia de Materiales de Madrid
8 SSOLEIL - Synchrotron SOLEIL

An energy-dispersive X-ray absorption spectroscopy beamline mainly dedicated to X-ray magnetic circular dichroism (XMCD) and material science under extreme conditions has been implemented in a bending-magnet port at the Brazilian Synchrotron Light Laboratory. Here the beamline technical characteristics are described, including the most important aspects of the mechanics, optical elements and detection set-up. The beamline performance is then illustrated through two case studies on strongly correlated transition metal oxides: an XMCD insight into the modifications of the magnetic properties of Cr-doped manganites and the structural deformation in nickel perovskites under high applied pressure.

Mots clés: XMCD; XAS; Instrumentation; high pressure

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Julio C. Cezar, Narcizo M. Souza-Neto, Cinthia Piamonteze, Edilson Tamura, Flavio Garcia, et al.. Energy-dispersive X-ray absorption spectroscopy at LNLS: investigation on strongly correlated metal oxides. Journal of Synchrotron Radiation, 2010, 17, pp.93-102. ⟨10.1107/S0909049509041119⟩. ⟨hal-00443730⟩