Berlin 2012 – wissenschaftliches Programm

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KR: Fachgruppe Kristallographie

KR 7: Joint Session "Soft X-ray Resonant Scattering for Complex Structural and Magnetic Investigations" (MA jointly with KR), Organization: Eberhard Goering (MPI-IS Stuttgart)

KR 7.3: Hauptvortrag

Mittwoch, 28. März 2012, 10:30–11:00, BH 243

Manipulating magnetic and electronic ordering phenomena by electric fields and electromagnetic radiation — •Urs Staub — Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI. Switzlerand

Complex oxides may exhibit very interesting magnetic properties such as the appearance of the colossal magneto-resistance effect, complex charge and orbital ordering phenomena as well as cross-talk of magnetic and electric polarizations in multiferroics. These effects open up the possibility of manipulating magnetism by electric fields or electromagnetic radiation. Here I will give examples, which show how resonant soft x-ray magnetic diffraction can be used to monitor changes to the underlying magnetic structure. I will discuss how the insitu application of an electric field can change the magnetic order or domain population in a multiferroic, how spins can be canted by x-rays or how fast an antiferromagnetic phase transition can be induced by an ultrafast optical excitation, being monitored by ultrafast magnetic x-ray diffraction.