01085nas a2200217   4500000000100000000000100001008004100002100001900043700001400062700002200076700002100098700001200119700001400131700001300145700001300158700002000171245005400191300001100245490000800256520060300264       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.