Neutron Diffraction Studies on Chemical and Magnetic Structure of Multiferroic PbFe0.67W0.33O3

TL;DR

This study synthesizes and characterizes the multiferroic PbFe0.67W0.33O3, revealing its cubic structure, antiferromagnetic order, and relaxor ferroelectric behavior at room temperature.

Contribution

It provides detailed neutron diffraction analysis and magnetic structure refinement of PbFe0.67W0.33O3, a multiferroic material synthesized via low temperature sintering.

Findings

Single phase cubic structure confirmed by neutron diffraction

G-type antiferromagnetic ordering at room temperature

Relaxor ferroelectric behavior with specific polarization values

Abstract

We report on the single phase synthesis and room temperature structural characterization of PbFe0.67W0.33O3 (PFW) multiferroic. The PFW was synthesized by low temperature sintering, Columbite method. Analysis of powder XRD pattern exhibits single phase formation of PFW with no traces of pyrochlore phase. Detailed analysis of room temperature neutron diffraction (ND) reveals cubic phase at room temperature, space group Pm-3m. The ND pattern clearly reveals magnetic Bragg peak at 2theeta = 18.51 (Q = 1.36{\AA}-1). The refinement of magnetic structure reveals G-type antiferromagnetic structure in PFW at room temperature. The dielectric constant and loss tangent decreases with increasing frequency. The room temperature P-E measurements shows a non-linear slim hysteresis, typical nature of relaxor multiferroics, with saturation and remnant polarizations of Ps = 1.50 microC/cm2 and Pr = 0.40 microC/cm2, respectively.