Neutron diffraction, Mossbauer effect and electron paramagnetic resonance studies on multiferroic Pb(Fe2​/3W1​/3)​O3

Multiferroic Pb(Fe2​/3W1​/3)​O3 ceramics were synthesized via a modified two-​stage Columbite method. Single phase formation was confirmed from the anal. of x-​ray and neutron diffraction patterns recorded at room temp. Structural anal. of the diffraction data reveals cubic phase (space group Pm-​3m) for the title compd. Magnetic structure of the title compd. at room temp. exhibits G-​type antiferromagnetic structure. The Mossbauer spectroscopy and ESR (EPR) studies were carried out at 300 K. The isomer shift and quadrupole splitting of the Mossbauer spectra confirms the trivalent state of iron (Fe3+)​. The Mossbauer spectra also suggest that the iron and tungsten are randomly distributed at the octahedral, B site. EPR spectra show a single broad line assocd. with Fe3+ ions. Both spectra clearly exhibit weak ferromagnetic behavior of Pb(Fe2​/3W1​/3)​O3 ceramic at 300 K. Considering neutron diffraction, Mossbauer and EPR results together, it may be stated here that Pb(Fe2​/3W1​/3)​O3 exhibits antiferromagnetic behavior along with weak ferromagnetism at room temp. (c) 2015 American Institute of Physics