Disorder influence on the magnetic properties of La0.55Sr0.45MnO3 / SrTiO3 superlattices

N. HABERKORN, M. SIRENA, J. GUIMPEL AND L. B. STEREN.

Roma, Italia

Conferencia; International Conference on Magnetism ICM2003; 2003

The structural and physical properties of La0.55Sr0.45MnO3 / SrTiO3 superlattices grown by magnetron sputtering are studied. Two deposition temperatures and different mismatched substrates and buffer layers were used. The structure was determined by refinement through X-ray diffraction pattern fitting. The results indicate 1 unit cell (u.c.) interdiffusion at the interfaces and a 1 u.c. layer thickness fluctuation, i.e. roughness. In-plane hysteresis loops show the expected ferromagnetic behavior, while the perpendicular-to-plane hysteresis loops show anomalies which could evidence magnetic domain size inhomogeneities and stress.