Ferroelectric, piezoelectric properties and magnetoelectric coupling behavior in aurivillius Bi₅Ti₃FeO₁₅ multiferroic nanofibers by electrospinning

Aurivillius Bi₅Ti₃FeO₁₅ (BTF) multiferroic (MF) nanofibers (NFs) of about 400 nm were fabricated by electrospinning and calcination. The BTF NFs exhibit an effective micro-piezoelectric coefficient of 35 pm/V and benign micro-ferroelectricity. Macro-ferroelectric and magnetoelectric coupling behavior were investigated in detail by non-sintering and pressing for the first time, which is smaller than that of the BTF ceramic or film due to the adverse effects of filled air. A magnetoelectric (ME) voltage coefficient as large as 14 mVcm^-1 Oe^-1 can be achieved.Weak ferromagnetismwas also realized at RT. Although the sintering temperature was only 600C, MF BTF NFs as multiferroic materials were successfully obtained, which offers new insights into the design and application of promising lead-free MF materials for novel devices.