Chemical solution deposition of multiferroic La_(0.7)Sr_(0.3)MnO_3, BaTiO_3 thin films prepared by ink plotting

摘要

Ferroelectric BaTiO_3 (BTO) as well as ferromagnetic La_(0.7)Sr_(0.3)MnO_3(LSMO) thin films were prepared by chemical solution deposition (CSD). Based on these, a multiferroic architecture stack of La_(0.7)Sr_(0.3)MnO_3/BaTiO_3 layers was developed. Aqueous, environment friendly precursor solutions were formulated for both materials. These are used for ink plotting on SrTiO_3 (100) substrates. Films were subjected to a subsequent thermal treatment at the corresponding crystallization temperature. The structural as well as the magnetic and electric properties are presented. The Curie temperature of the ferromagnetic LSMO layer with a film thickness of only 60 nm was determined to 360 K. The magnetization curve indicates a hysteresis loop with a saturation magnetization above 400 emu/cm~3. The ferroelectric character of the BTO films was demonstrated by polarization curves.