Berlin 2012 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 48: PhD Student Symposium: "Spintronics on the Way to modern Storage Technology II", Organization: "Univ. Mainz team"

MA 48.1: Hauptvortrag

Donnerstag, 29. März 2012, 13:00–13:30, BH 243

Ultrafast manipulation of magnetic order — •Theo Rasing — Radboud University Nijmegen

The interaction of sub-picosecond laser pulses with magnetically ordered materials has developed into an extremely exciting research topic in modern magnetism and spintronics. From the discovery of sub-picosecond demagnetization to the recent demonstration of magnetization reversal by a single 40 femtosecond laser pulse, the manipulation of spins by ultra short laser pulses has become a fundamentally challenging topic with a potentially high impact for future spintronics, data storage and manipulation and quantum computation. In addition, when the time-scale of the perturbation approaches the characteristic time of the exchange interaction (~10-100 fs), the soin dynamics enters a novel, highly non-equilibrium, regime where the exchange interaction might even become time dependent. Using ultrashort excitations, we may be able to manipulate the exchange interaction itself. Such studies require the excitation and probing of the spin and angular momentum contributions to the magnetic order at timescales of 10fs and below, a challenge to be met by future fs X-ray FEL*s.

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