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Regensburg 2016 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 54: Electron Theory of Magnetism and Micromagnetic Simulations

MA 54.11: Vortrag

Freitag, 11. März 2016, 12:45–13:00, H34

Calculation of GMR effects in granular systems — •Daniel Kappe1,2, Lisa Teich2, Christian Schröder2, and Andreas Hütten11Center for Spinelectronic Materials and Devices, Physics Department, Bielefeld University, Germany — 2Bielefeld Institute for Applied Materials Research, University of Applied Sciences Bielefeld, Germany

A macroscopic, semiclassical model was implemented to calculate GMR effects systems which are composed of a non-magnetic matrix and magnetic nanoparticles. There are a couple of publications, which propose models to describe granular systems [1,2]. Those approaches average over all grains and thus do not address the magnetic configuration of the small magnetic particles and clusters of particles. The presented model uses Finite Elements calculations and inputs from micromagnetic simulations [3] to address this issue.

[1] Zhang, Shufeng, and Peter M. Levy. "Conductivity and magnetoresistance in magnetic granular films." Journal of applied physics 73.10 (1993): 5315-5319.

[2] Xing, Lei, and Yia-Chung Chang. "Theory of giant magnetoresistance in magnetic granular systems." Physical Review B 48.6 (1993): 4156.

[3] Teich, Lisa, and Christian Schröder. "Hybrid Molecular and Spin Dynamics Simulations for Ensembles of Magnetic Nanoparticles for Magnetoresistive Systems." Sensors 15.11 (2015): 28826-28841.

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