Dielectric, magnetic and optical study of La- doped BFO-BST ceramic for multifunctional applications

Composites having magnetostriction and piezoelectric behavior envisioned to reach the destination of room temperature magneto-electric (ME) coupling for practical device fabrications. For better ME coupling it is essential to acquire higher values of magnetostriction, Neel temperature (T-N), resistivity and magnetization of magnetic composites. In this context we are investigating structural, dielectric, electrical and magnetic behavior of 0.5(Bi0.75La0.25Fe)O-3-0.5(Ba0.5Sr0.5Ti)O-3 (BLF-BST). Through Rietveld analysis of X-ray diffraction data it suggests composite have single phase orthorhombic crystal structure with pbnm space group. The dielectric study reveals both magneto-dielectric transition and transport properties investigated through impedance spectral analysis which suggests the present candidate has moderate Curie temperature (T-C), high resistivity. Room temperature magnetic study reflects ferromagnetic retentively (M-r) (0.04 emu/gram) with coercive field (H-c)similar to 3 kOe which looks better for practical device applications.

Automated summary

Investigation of a composite material with magnetostriction and piezoelectric behavior shows promising characteristics for practical device applications, with moderate Curie temperature, high resistivity, and ferromagnetic properties.