Regensburg 2013 – wissenschaftliches Programm

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DF: Fachverband Dielektrische Festkörper

DF 22: Poster II

DF 22.12: Poster

Freitag, 15. März 2013, 10:30–13:30, Poster D

Exchange bias in DyCo/NiFe bilayer — •Kai Chen¹, Dieter Lott¹, Andreas Schreyer¹, R.S Iskhakov^2,3, S.V Stolyar^2,3, and V.Yu Yakovchuk² — ¹Institute for Materials Research, Helmholtz-Zentrum Geesthacht, 21502 Geesthacht , Germany — ²Kirensky Institute of Physics SB RAS, Krasnoyarsk, 660036,Russia — ³Siberian Federal University, Krasnoyarsk, 660041, Russia

High in-plane exchange bias up to 40 mT at room temperature was found through-out the whole hard ferrimagnetic layer of DyCo which is coupled to NiFe layer. The exchange bias effects can be achieved here by magnetizing the DyCo in perpendicu-lar direction in respect to the film plane. The direction of the shifts of the in-plane hysteresis is dependent on the direction of the pre-magnetization in the one or other direction. Results from magnetic optical Kerr effect (MOKE), X-ray magnetic cir-cular dichorism (XMCD) and Polarized Neutron Reflectometry (PNR) are discussed to investigate the mechanism behind.