Berlin 2012 – scientific programme

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AGjDPG: Arbeitsgruppe junge DPG

AGjDPG 8: PhD Student Symposium: Spintronics on the Way to modern Storage Technology II

AGjDPG 8.4: Talk

Thursday, March 29, 2012, 14:15–14:30, BH 243

Manipulation of Skyrmions created by opto-magnetic switching — •Stefan Gerlach, Denise Hinzke, and Ulrich Nowak — University of Konstanz, 78457 Konstanz, Germany

Magnetic bubbles are spots of opposite magnetization and can be observed in ferromagnetic thin films and nanoelements with high perpendicular anisotropy[1]. Their dynamics is determined by a topological number called the Skyrmion number which relates them to the well-known and similiar Skyrmions[2].

Opto-magnetic switching is known to reverse the magnetization of small spots in thin films within picoseconds[3]. We use Landau-Lifshitz-Bloch (LLB)-based simulations which allow for the linear reversal mechanism[4] combined with a two temperature model to describe the opto-magnetic switching. We will show how bubble domains can be created and discuss their dynamics when manipulated with external magnetic fields.

[1] C. Moutafis, et al., Phys. Rev. B 79, 224429 (2009)

[2] N. S. Kiselev et al., J. Phys. D: Appl. Phys. 44, 392001 (2011)

[3] K. Vahaplar et al., Phys. Rev. Lett. 103, 117201 (2009)

[4] N. Kazantseva et al., Phys. Rev. B 77, 184428 (2008)