Yttrium iron garnet – lead-barium titanate particulate multiferroic composites

ABSTRACT

Ba_1−xPb_xTiO₃/Y₃Fe₅O₁₂ particulatecomposites with х = 0–1 were synthesized. The composites (100-y) wt.% Ba_0.9Pb_0.1TiO₃ – y wt.% Y₃Fe₅O₁₂ with у = 40–50 wt.% exhibit ME coupling coefficient ΔЕ/ΔH of ∼10 mV/(cm·Oe) due to the prominent piezoelectric properties. ME response in Ва_1−хPb_xTiO₃/Y₃Fe₅O₁₂ ceramics with х = 0.35−1 is precluded by a high content of pyrochlore-type Y₂Ti₂O₇ that forms through chemical interfacial interaction. An increase in sintering temperature to 1300°С was found to be inappropriate to obtain phase-pure ВаTiO₃/Y₃Fe₅O₁₂ ceramics due to the partial decomposition of Y₃Fe₅O₁₂ to yttrium orthoferrite YFeO₃.

KEYWORDS:

• Composites
• multiferroics
• magnetoelectrics
• garnets