Thin films sputtered from Ba2NdFeNb4O15 multiferroic targets on BaFe12O19 coated substrates

Abstract Ba 2 NdFeNb 4 O 15 tetragonal tungsten bronze (TTB)/BaFe 12 O 19 (BaM) hexaferrite bilayers have been grown by RF magnetron sputtering on Pt/TiO 2 /SiO 2 /Si (PtS) substrates. The BaM layer is textured along (0 0 1) while the TTB layer is multioriented regardless of the PtS or BaM/PtS substrate. Dielectric properties of TTB films are similar to those of bulk, i.e. , e ∼ 150 and a magnetic hysteresis loop is obtained from TTB/BaM bilayers, thanks to the BaM component. This demonstrates the possibility of transferring to 2 dimensional structures the composite multiferroic system TTB/BaM previously identified in 3 dimensional bulk ceramics.