Structural ordering and magnetic property of complex perovskite solid solution (1-x)Pb(Fe2/3W1/3)O3 - xPb(Mg1/2W1/2)O3

Chun Fa Yao, Cai Fu Li, Zhi Quan Liu, Jian Ku Shang

Research output: Contribution to journalArticlepeer-review

Abstract

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°C, 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.

Original languageEnglish (US)
Pages (from-to)649-654
Number of pages6
JournalWuji Cailiao Xuebao/Journal of Inorganic Materials
Volume26
Issue number6
DOIs
StatePublished - Jun 1 2011

Keywords

  • Magnetic property
  • Multiferroic
  • Ordering
  • Perovskite
  • Sol-Gel

ASJC Scopus subject areas

  • Materials Science(all)
  • Inorganic Chemistry

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