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Functionality in materials bases not only on the possibility to affect their properties with external stimuli, but also on the time and length scales such switching occurs on. Time-resolved experimental techniques explore switching behavior directly and furthermore provide access to coupling mechanisms between different electronic and structural degrees of freedom. In the field of magnetic dynamics, the laser-induced suppression of helical spin order in heavy lanthanide metals reveals a new and very efficient angular-momentum transfer channel. For the antiferromagnetic semiconductor EuTe we studied the interplay between magnetic and structural dynamics. For the photon-pulse-induced Verwey transition in magnetite, we could further narrow down the time scale on which orbital order decays as well as gain further insight into the character of the low-temperature phase.

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Christian Schüßler-Langheine, Helmholtz Zentrum Berlin
Seminar Room of the Institute of Physics II
Contact: Thomas Koethe