Abstract

The interplay between electronic, spin and lattice degrees of freedom often determines the function of complex materials such as ferromagnets, high TC superconductors, colossal magnetoresistive and multiferroic oxides. Charge and orbital ordering phenomena can lead to metal-insulator transitions with temperature or chemical doping. These phenomena can ideally be studied using soft x-rays which probe directly the valence orbitals responsible for electronic and spin order. Time resolved optical pump – x-ray probe studies offer the exciting prospect of observing the flow of energy and angular momentum in real time. In this talk an overview over two prototype systems are given: an itinerant ferromagnet, Ni and a highly correlated electron material, Fe3O4.

© 2009 APS DLS

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