A systematic study on magnetic, dielectric and magnetocapacitance properties of Ni doped bismuth ferrite

In this paper we report the structural, magnetic, magnetocapacitance and dielectric properties of BiFe1−xNixO3 nanoceramics (with x=0, 0.1) prepared by the sol-gel method. XRD analysis showed formation of single phase nanoceramics (particle size ∼50 nm by TEM). Samples of BiFe1−xNixO3 were divided into two parts—one of them quenched in liquid nitrogen and another sintered in the normal way. We observed the enhancement in magnetic and dielectric properties of quenched sample. The splitting of zero field cool (ZFC) and field cool (FC) magnetization curves at low temperature reveals spin- glass behavior. Quenched sample showed the enhancement of blocking temperature.

► Greatly enhanced magnetization (magnetic moment of∼3.04 emu/g) in Ni doped BiFeO3 nanoceramics.
► Magnetization was found to higher than previously reported [Ref. [9] and [14]].
► Samples quenched in liquid nitrogen showed enhancement in the magnetic and dielectric properties.
► Samples quenched in liquid nitrogen showed enhancement of blocking temperature.
► Splitting of ZFC and FC curve of magnetization at low temperature reveals spin- glass behavior.