@article {2422, title = {Pseudo exchange bias due to rotational anisotropy}, journal = {Journal of Magnetism and Magnetic Materials}, volume = {412}, year = {2016}, pages = {7{\textendash}10}, abstract = {Ferromagnetic nanostructure arrays with particle dimensions between 160 nm and 400 nm were created by electron-beam lithography. The permalloy structures consist of rectangular-shaped walls around a square open space. While measuring their magnetic properties using the Magneto-Optical Kerr Effect (MOKE), in some angular regions an exchange bias (EB) seemed to appear. This paper gives an overview of possible reasons for this {\textquotedblleft}pseudo exchange bias{\textquotedblright} and shows experimentally and by means of micromagnetic simulations that this effect can be attributed to unintentionally measuring minor loops.}, keywords = {Exchange bias; Rotational anisotropy; Nanostructures; Simulation; Magnetization reversal; Patterned structures; MOKE; Lithography}, doi = { 10.1016/j.jmmm.2016.03.071}, author = {Andrea Ehrmann and Komraus, S and Tomasz Blachowicz and Krzysztof Domino and Nees, MK and Jakobs, PJ and Leiste, H and Mathes, M and Schaarschmidt, M} }