Magnetic and ferroelectric studies of double perovskite (KBi)(FeNb)O{sub 6} ceramics

This work describe the synthesis and characterization of the (KBi)(FeNb)O{sub 6} (KBFN) complex Perovskite. This compound has been structurally characterized by powder X-ray diffraction. The magnetic property of KBFN has been measured. The magnetic properties of (KBi)(FeNb)O{sub 6} is found to be a antiferromagnetically at temperature ranging from {approx}26K. The experimental results indicates that the magnetic moments of Fe{sup 3+} ion in (KBi)(FeNb)O{sub 6} order antiferromagnetically with a slight ferromagnetic moment below ca .26K and weak ferromagnetic moments disappears above ca. 26 K. The ferroelectric behaviour of polarization vs. applied electric field measurements were taken for the KBFN pellet. The shape of the curve are neither consistent with ferroelectric behaviour but rather indicative of conduction.