Dresden 2006 – wissenschaftliches Programm

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MA: Magnetismus

MA 20: Poster: Films(1-36) Transp(37-56) Ex.Bias(57-67) Spindyn(68-80) Micromag(81-95) Particle(96-109) Imag.+Surface(110-113) Spinelectr(114-122) Theory+Micromag(123-131) Spinstr+Aniso(132-142) MagMat(143-156) Meas(157,158) MolMag+Kondo(159-162) Postdead(163-)

MA 20.59: Poster

Dienstag, 28. März 2006, 15:15–19:15, P1

Thermal stability of three dimensional structured exchange bias systems with ion bombardment induced magnetic patterning — •V. Höink¹, M. D. Sacher¹, K. Rott¹, J. Schmalhorst¹, G. Reiss¹, D. Engel², T. Weis², and A. Ehresmann² — ¹Universität Bielefeld, Fakultät für Physik, Dünne Schichten und Nanostrukturen, PF 100131, D-33501 Bielefeld — ²Universität Kassel, Institut für Physik, Heinrich-Plett-Str. 40, D-34132 Kassel

The magnitude as well as the direction of the exchange bias effect in ferromagnet/antiferromagnet layer systems can be manipulated by He-ion bombardment in a magnetic field. By restricting the area exposed to ion bombardment by resist masks, magnetic nanostructures characterized by a lateral variation of the orientation of the magnetization in remanence can be produced. This magnetic nanostructuring can be used for new applications in magnetoelectronics. In the experiments presented here CoFe/IrMn double layers have been patterned magnetically as well as three dimensional with a varying shape and size. By spacially resolved measurements of the absorbtion of elliptically polarized soft x-rays with a photo electron emission microscope (PEEM), the magnetically patterned three dimensional structures have been investigated in remanence and the magnetic domain configuration has been measured for several temperatures. The PEEM measurements have been performed at the PEEM2 beamline 7.3.1.1 at the Advanced Light Source, Berkeley, USA.