The structural and magnetic properties of LaMnO 3 /LaFeO (LMO/LFO) heterostructures are characterized using a combination scanning transmission electron microscopy, energy-loss spectroscopy, bulk magnetometry, resonant x-ray reflectivity. Unlike the relatively abrupt interface when LMO is deposited on top LFO, with reversed growth order shows significant cation intermixing Mn 3+ Fe , spreading ...