Regensburg 2013 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 9: Spincaloric Transport (jointly with TT)

MA 9.5: Vortrag

Montag, 11. März 2013, 16:00–16:15, H22

Dynamics of domains in thermal gradients — •Frank Schlickeiser, Denise Hinzke, and Ulrich Nowak — Universität Konstanz, 78457 Konstanz, Germany

Many of the recently proposed future magnetic storage devices are based on laser-pulse or current-induced writing schemes, as for example opto-magnetic writing [1]. An unavoidable by-product of these writing schemes are thermal gradients, so that the understanding of their interaction with magnetic structure becomes important. We investigate the dynamics of domains in thin ferromagnetic CoPd films triggered by thermal gradients by means of computer simulations, based on the Landau-Lifshitz-Bloch-equation. The latter describes the dynamics of a thermally averaged spin polarization on micro-magnetic length scales [2]. We show that in a Gaussian temperature profile the magnetic structure is modified towards a radial orientation of the domains. Our numerical results are compared with recently performed measurements. We acknowledge financial support by the DFG through SFB 767. [1] K. Vahaplar et al.,Phys. Rev. Lett. 103, 117201 (2009), [2] D. Hinzke and U. Nowak, Phys. Rev. Lett. 107, 027205 (2011).