BTF NFs exhibit an effective micro–piezoelectric coefficient of 35 pm/V.
Weak macro-ferroelectric was studied by the method of non-sintering and pressing.
Magnetoelectric coupling behavior (14 mVcm−1 Oe−1) was also obtained by pressing.
Weak ferromagnetism was also realized at RT in BTF NFs.
MF BTF NFs as multifunctional materials could be promising for novel devices.