Regensburg 2013 – scientific programme

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MA: Fachverband Magnetismus

MA 49: Magnetization Dynamics III of 3

MA 49.5: Talk

Friday, March 15, 2013, 10:30–10:45, H22

Configurational dependence of the magnetization dynamics in spin valve systems — •Ruslan Salikhov¹, Radu Abrudan¹, Frank Brüssing¹, Florin Radu², Ilgiz Garifullin³, Kurt Westerholt¹, and Hartmut Zabel¹ — ¹Ruhr-Universität Bochum, Germany — ²Helmholtz Zentrum Berlin für Materialien und Energien, Berlin, Germany — ³Zavoisky Physical-Technical Institute of Russian Academy of Sciences, Kazan, Russia

Using time-resolved x-ray resonant magnetic scattering (tr-XRMS), which was implemented using the ALICE chamber at BESSY II of the Helmholtz Zentrum Berlin [1], we report on the precessional dynamics of spin valve systems with parallel (P) and antiparallel (AP) orientation of magnetizations. We observe in Co/Cu/Py spin valve systems an increase of the magnetic damping parameter in Py with changing magnetization direction of Py and Co layers from P to AP orientation [2]. We attribute this finding to the configurational dependence of the spin pumping effect [3]. Furthermore we studied the temperature dependence and possible other causes for the configurational dependence of the damping parameter, such as domain wall induced coupling or magnetic dipole coupling [4]. The main focus is on Co/Cu/Py trilayers and on Co2MnGe/V/Py trilayers with spin valve properties.

[1] St. Buschhorn et al., J. Synchr. Rad. 18, 212 (2011). [2] R. Salikhov et al., Appl. Phys. Lett. 99, 092509 (2011). [3] J.-V. Kim, C. Chappert, JMMM 286, 56 (2005). [4] R. Salikhov et al., Phys. Rev. B 86, 144422 (2012).