Magnetoelectric behaviors in BaTiO3/CoFe2O4/BaTiO3 laminated ceramic Check composites prepared by spark plasma sintering

The BaTiO3 (BTO) / CoFe2O4 (CFO) / BaTiO3 (BTO) laminated ceramic composites were prepared via spark plasma sintering (SPS). The ceramic composites were highly dense with clear boundaries between the three layers. The short time and low temperature required for densification during the SPS process diminish the possibility for unwanted reactions to occur. The BTO/CFO/BTO laminated ceramic composites exhibit excellent ME properties including: (1) maximal ME voltage coefficient as high as similar to 1.0 V/Oe cm; (2) obvious AC magnetic field frequency response and sensitivity from 10(2) to 10(7) Hz; (3) perfect ME anisotropy matches well with the theoretical fitting curve; (4) giant transverse ME voltage coefficient as large as similar to 4.1 V/Oe cm at resonance frequency of similar to 10(5) Hz. It is possible to fabricate several kinds of ME function devices with the BTO/CFO/BTO laminated ceramics prepared in this work.