Resonant and magnetic X-ray diffraction by polarized synchrotron radiation

Luigi Paolasini,V Simonet,J Robert,H Mutka,S Petit,B Canals

doi:10.1051/sfn/20141303002

Abstract

The aim of these notes is to introduce the experimental methods and theoretical works in the domain of magnetic and resonant x-rays scattering on single crystals to investigate the electronic and magnetic long range order in strongly correlated electron systems. We highlight the role of the x-rays polarization analysis and control to determine the magnetic structure of materials and, more generally, the electronic long range order parameters responsible for the phase transitions.

Highlights

The investigation of the electronic and magnetic order parameters and their evolution as a function of thermodynamic variables is one of the main research fields in the domain of strongly correlated electron systems and complex materials, in which different and often competing order parameters are present, giving rise to many spectacular manifestations of quantum physics in condensed matter
We shows how it is possible to exploit the basic properties of synchrotron radiation interaction with the bound electrons in solid to determine the magnetic structure of materials and, more generally, the electronic long range order parameters responsible for the phase transitions
From the previous section it is clear that in order to discriminate the scattering events summarized in Eq (2.2), it is necessary to develop an appropriate instrumentation able to deal with the complex relationships between the different interference terms that could be encountered in a diffraction experiment

Summary

Introduction

The investigation of the electronic and magnetic order parameters and their evolution as a function of thermodynamic variables is one of the main research fields in the domain of strongly correlated electron systems and complex materials, in which different and often competing order parameters are present, giving rise to many spectacular manifestations of quantum physics in condensed matter. Several scattering techniques using neutrons, x-rays, muons, electrons are exploited to investigate the microscopic electronic correlations in solids. Among these different techniques, neutrons have occupied an important role in the studies of magnetism in condensed matter, and they represent one of the most important tools to investigate the static and dynamic magnetic correlations in crystalline materials. In the last fifteen years the number of beamlines dedicated to magnetic investigations has been growing at an amazing rate, and today every major synchrotron light source has a large variety of specialized instruments

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Conclusion