Berlin 2018 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 26: Thin films – coupling effects

MA 26.2: Vortrag

Mittwoch, 14. März 2018, 09:45–10:00, EB 301

Influence of deposition and field cooling parameters on sputter-deposited polycrystalline exchange bias layer systems — •Maximilian Merkel¹, Jonas Zehner², Karin Leistner², Dennis Holzinger¹, and Arno Ehresmann¹ — ¹Institute of Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Heinrich-Plett-Str. 40, D-34132 Kassel — ²Leibniz Institute for Solid State and Materials Research Dresden, IFW Dresden, Helmholtzstr. 20, D-01069 Dresden

Magnetic properties of sputter-deposited polycrystalline exchange bias thin films evolve from a complex interplay of different individual magnetic anisotropies which are directly connected to the grain size distribution, crystallite texture and interface structure of the layer system. These structural characteristics can be controlled via deposition parameters or manipulated during a thermal activation procedure in an external magnetic field. Angle-resolved hysteresis measurements using Kerr magnetometry in comparison to an extended Stoner-Wolfarth model [1], X-ray diffraction experiments and interface roughness characterization allowed for the quantification of material properties in dependence of deposition and field cooling parameters supporting common structure zone models.

[1] Müglich, N. D., Gaul, A., Meyl M., Ehresmann, A. , Götz, G., Reiss, G., Kuschel T., Time-dependent rotatable magnetic anisotropy in polycrystalline exchange-bias systems: Dependence on grain-size distribution, Physical Review B 94, 184407 (2016)