Abstract
We report the evidence of weak ferromagnetic and ferroelectric ordering in polycrystalline Pb(Fe-0.634 W0.266Nb0.1)O-3 (0.8(PbFe2/3W1/3)O-3-0.2Pb(Fe1/2Nb1/2) O-3) (PFWN) ceramic at room temperature. The Pb(Fe-0.634 W0.266Nb0.1)O(3)solid solution synthesized through the columbite method. The obtained single-phase Pb(Fe-0.634 W0.266Nb0.1)O(3)ceramic was subjected to X-ray diffraction, neutron diffraction, magnetization, Mossbauer spectroscopy, and ferroelectric measurements. The X-ray diffraction and neutron diffraction pattern confirms the formation of single phase without any traces of pyrochlore phases, having cubic structure with Pm-3m space group. The Rietveld refinements were carried out on both patterns, and ND data confirms the G-type antiferromagnetic structure with propagation vector (k = 1/2, 1/2, and 1/2). However, along with the antiferromagnetic ordering of the Fe spins, we also observed the existence of weak ferromagnetism. This result was confirmed through (i) a clear opening of hysteresis (M - H) loop, (ii) bifurcation of the field-cooled (FC) and zero-field-cooled (ZFC) susceptibilities, (iii) spin-glass behavior, and (iv) Mossbauer spectroscopy.
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