Dresden 2014 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 52: Magnetic Materials IV

MA 52.7: Vortrag

Freitag, 4. April 2014, 11:00–11:15, HSZ 403

The influence of the domain wall sub-structures on magnetization reversal — •Sukhvinder Singh, Haibin Gao, and Uwe Hartmann — Institute of Experimental Physics, Saarland University, P O. Box 151150, D66041, Saarbrücken, Germany

Sub-structures (Bloch Lines, cross-tie wall components, vortex-antivortex pairs) of domain walls significantly affect the magnetic properties of patterned materials [1, 2]. In this study we have investigated their influence towards the magnetization reversal of microstructured thin films. The patterns were prepared in square and rectangular shapes of various aspect ratios by means of e-beam lithography. Different thicknesses of Permalloy (Ni81Fe19) in the range of 20 nm to 150 nm were prepared by sputtering. An in-plane static magnetic field was applied to move the domain walls. The changes in the sub-structures of domain walls were observed by Magnetic Force Microscopy. The results were compared with micromagnetic simulations and the contributions of the different magnetic energies were investigated.

[1] C. Y. Kuo et al. J. Magn. Magn. Mater. 310, e672 (2007)

[2] C. Zinoni et al. Phys. Rev. Lett. 107, 207204 (2011)