01072nas a2200205   4500000000100000008004100001100001900042700001400061700002200075700002100097700001200118700001400130700001300144700001300157700002000170245005400190300001100244490000800255520060300263       2016                            d1 aAndrea Ehrmann1 aS Komraus1 aTomasz Blachowicz1 aKrzysztof Domino1 aMK Nees1 aPJ Jakobs1 aH Leiste1 aM Mathes1 aM Schaarschmidt00aPseudo exchange bias due to rotational anisotropy  a7–100 v4123 aFerromagnetic 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 “pseudo exchange bias” and shows experimentally and by means of micromagnetic simulations that this effect can be attributed to unintentionally measuring minor loops.