Berlin 2015 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 41: Focus: All-optical magnetic switching

MA 41.5: Hauptvortrag

Donnerstag, 19. März 2015, 12:00–12:30, H 1012

Ultrafast magnetization dynamics of thin films showing helicity dependent magnetization switching — •Grégory Malinowski — Institut Jean Lamour, Département P2M Université de Lorraine - CNRS UMR 7198 Boulevard des Aiguillettes, BP 239 54506 VANDOEUVRE LES NANCY Cedex (France)

The interplay of light and magnetism has been a topic of interest since the original observations of Faraday and Kerr where magnetic materials affect the light polarization. While these effects have historically been exploited to use light as a probe of magnetic materials there is increasing research on using polarized light to alter or manipulate magnetism. For instance deterministic magnetic switching without any applied magnetic fields using laser pulses of the circular polarized light has been observed for specific ferrimagnetic materials [1,2]. More recently, optical control of ferromagnetic materials ranging from magnetic thin films to multilayers and even granular films have been shown to present helicity dependent magnetization reversal [3,4]. In this presentation, we will focus on ultrafast magnetization dynamics of thin films multilayers and alloys showing helicity dependent all-optical switching. [1] C.D. Stanciu et al., Physical Review Letters 99(4), 047601 (2007). [2] S. Alebrand et al., Applied Physics Letters 101(16), 162408 (2012). [3] S. Manginet al., Nat Mat ,3864 (2013). [4] C. Lambert et al., Science 345, 1337 (2014)