Regensburg 2010 – scientific programme
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MA: Fachverband Magnetismus
MA 33: Poster II
MA 33.17: Poster
Friday, March 26, 2010, 11:00–14:00, Poster B1
Magnetic properties of ion beam induced ripple patterned Fe layers — •Felix Büttner, Hans Hofsäss, and Kun Zhang — II. Physikalisches Institut, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, D-37077 Göttingen, Germany
There is a rapidly growing interest in nanopattered ferromagnetic films. Apart from fundamental investigations, one motivation is the search for materials which are ferromagnetic even at nanometer scale. It has been found that ion beam induced ripples of epitaxially grown Co induce a strong uniaxial magnetic anisotropy [1]. Comparable experiments with epitaxial Fe films on MgO [2] and polycrystalline Fe films on Si [3], both textured by ion beam erosion, showed similar magnetic properties. This study is about nanopattered thin epitaxial Fe layers grown on MgO by PLD. Pattering was done by grazing incidence sputter erosion using 5 keV Xe ions with a fluence of 1.8· 1017 ions cm−2. We investigate the magnetic and structual properties of the nanopattered Fe layers as a function of the residual film thickness using MOKE, RBS and AFM. Both side polished MgO substrates were used to perform MOKE measurements of the Fe / MgO interface to determine the influence of the ion beam induced surface ripple patterns on the magnetic properties of the unirradiated underlying layer.
[1] D. Sekiba, R. Moroni, G. Gonella, F. Buatier de Mongeot, C. Boragno, L. Mattera and U. Valbusa, Appl. Phys. Lett. 84, 762 (2004)
[2] Q. Zhan and K. Temst, Appl. Phys. Lett. 91, 122510 (2007)
[3] K. Zhang, M. Uhrmacher, H. Hofsäss and J. Krauser, J. Appl. Phys. 103, 083507 (2008)