Berlin 2018 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 6: Ultrafast magnetism I

MA 6.1: Vortrag

Montag, 12. März 2018, 09:30–09:45, EB 407

Manipulation of magnetic order in antiferromagnets — •Fabian Mertens, Marc Terschanski, Stefano Ponzoni, Davide Bossini, and Mirko Cinchetti — Experimentelle Physik VI, TU Dortmund, Otto-Hahn-Straße 4, 44227 Dortmund, Germany

The spin dynamics in antiferromagnetic materials is intrinsically fast compared to other magnetic materials, making antiferromagnets interesting for possible future applications like faster data storage. In this talk, we present the magneto-optical setup that was recently built in our group to study the ultrafast optical manipulation of the magnetic order in antiferromagnets. The setup is based on a femtosecond laser with repetition rates of up to 1 MHz, coupled to two optical parametic amplifiers (OPA) for the independent tuning of the pump and the probe beam to photon energies between 0.5 eV up to 3.5 eV. The problem of single pulse detection at high repetition rates was solved by a home-built balanced photodetector. We will present the characterization of the home-built detector and the first experimental results optained with the setup.