Supplementary Information on : Chemical insight into electroforming of resistive switching manganite heterostructures

F. Borgatti, C. Park, A. Herpers, F. Offi, R. Egoavil, Y. Yamashita, A. Yang, M. Kobata, K. Kobayashi, J. Verbeeck, G. Panaccione, and R. Dittmann CNR – Istituto per lo Studio dei Materiali Nanostrutturati (ISMN), via P. Gobetti 101, I-40129 Bologna, Italy Peter Gruenberg Institute (PGI-7) and JARA-FIT Forschungszentrum Juelich GmbH, 52425 Juelich, Germany CNISM and Dipartimento di Scienze, Università Roma Tre, Rome, Italy EMAT, Electron Microscopy for Materials Science, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium NIMS beamline Station at Spring-8, National Institute for Materials Science, Sayo, Hyogo 679-5148, Japan CNR – Istituto Officina dei Materiali (IOM), Laboratorio TASC, S.S.14, Km 163.5, I-34149 Trieste, Italy