Colossal magnetoresistive (CMR) La 0.7 Sr 0.3 MnO 3 (LSMO) thin films have been grown under tensile strains on (100)-SrTiO 3 substrates and compressive strains on (100)-LaAlO 3 and (110)-NdGaO 3 substrates by pulsed laser deposition. Using magnetic force microscopy (MFM), a "feather-like" magnetic pattern, characteristic of films with an in-plane magnetization, is observed for films deposited on both SrTiO 3 and NdGaO 3 while a "bubble" magnetic pattern, typical of films with an out-of plane magnetization, is recorded for LaAlO 3 .We show that the shape of the magnetic pattern imaged by MFM is fully correlated to the easy direction of the magnetization in the film.Electronic mail : desfeux@univ-artois.fr

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