%0 Journal Article
%T Structural Ordering and Magnetic Property of Complex Perovskite Solid Solution (1―x)Pb(Fe2/3W1/3)O3―xPb(Mg1/2W1/2)O3
%A YAO Chun-Fa
%A LI Cai-Fu
%A LIU Zhi-Quan
%A SHANG Jian-Ku
%J 无机材料学报
%D 2011
%I Science Press
%R 10.3724/sp.j.1077.2011.00649
%X Pb(Fe2/3W1/3)O3 was modified by doping Pb(Mg1/2W1/2)O3 with Sol―Gel method using inorganic salts as precursors. At calcination temperature of 700  , the resulted solid solution (1―x)Pb(Fe2/3W1/3)O3―xPb(Mg1/2W1/2)O3 kept a perovskite structure in the whole doping range of 0≤x≤1. The obtained Pb(Mg1/2W1/2)O3 (x=1) is fully ordered with a unit cell as two times as that of Pb(Fe2/3W1/3)O3 (x=0). Solid solution (1―x)Pb(Fe2/3W1/3)O3― xPb(Mg1/2W1/2)O3 (0<x<1.0) also has an ordered crystal structure showing supperlattice peaks of 1/2 (111) and 1/2 (311) in X―ray diffraction, whose intensities become stronger as x increases. Combining electron diffraction and elemental analysis in transmission electron microscope, solid solution (1―x)Pb(Fe2/3W1/3)O3―xPb(Mg1/2W1/2)O3 is verified as a single phase with perovskite structure, rather than a mixture of two phases. The particles of solid solution have a cubic morphology, and their grain size first decreases and then increases when doping coefficient x varies from 0.2 to 0.8. Due to the substitution of larger Mg2+ for smaller Fe3+ ions, its lattice constant increases linearly with the enhancement of x. According to the measured M―H curves, the magnetic performance of the solid solution decays as the doping coefficient x increases, because the formation of diamagnetic Pb(Mg1/2W1/2)O3 could destroy the ―Fe3+―W―O―W―Fe3+― and ―Fe3+―O―Fe3+― magnetic bonds in antiferromagnetic Pb(Fe2/3W1/3)O3 phase.
%K multiferroic
%K perovskite
%K Sol-Gel
%K ordering
%K magnetic property
%U http://www.jim.org.cn/fileup/PDF/20110615.pdf