F. Genuzio, A. Sala, T. Schmidt, D. Menzel and H.-J. Freund: Interconversion of α-Fe2O3 and Fe3O4 Thin Films: Mechanisms, Morphology, and Evidence for Unexpected Substrate Participation. The Journal of Physical Chemistry C118 (50), 29068–29076 (2014).
T. Schmidt, A. Sala, H. Marchetto, E. Umbach and H.-J. Freund: First experimental proof for aberration correction in XPEEM: Resolution, transmission enhancement, and limitation by space charge effects. Ultramicroscopy126, 23–32 (2013).