Dresden 2009 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 8: Magnetic Coupling Phenomena / Exchange Bias
MA 8.8: Vortrag
Montag, 23. März 2009, 17:00–17:15, HSZ 401
Exchange bias in varied PtMn/CoFe systems — •Matthias Hawraneck1,2, Wolfgang Raberg1, Jürgen Zimmer1, Klemens Prügl1, Thomas Bever1, and Lambert Alff2 — 1Infineon Technologies AG, Am Campeon 1-12, 85579 Neubiberg — 2Institut für Materialwissenschaften, TU Darmstadt, Petersenstr. 23, 64287 Darmstadt
In magnetic spin valves, used e.g. in HDD read heads, the exchange bias (EB) is used to fix the magnetization of one layer, the so called ``pinned layer''. A very important requirement of spin valves in such applications is their stability with respect to temperature and magnetic field. At elevated temperatures interlayer diffusion degrades the spin valve [1]. In combination with temperature a magnetic field can influence the EB and thus the spin valve performance. We investigated the influence of various parameters in the PtMn deposition regarding the EB strength and stability. We observe that the gas flow at the sputtering process, the annealing temperature during the PtMn formation and the seed layer thickness show big influence on initial performance and stability.
[1] M. Hawraneck et. al., Appl. Phys. Lett. 93 012504 (2008)