Issue Information
روزنامه با شماره پیاپی سال 2011
Pages
4
From page
5
To page
8
Abstract
BiFeO3 ceramics synthesized at high temperature and pressure is observed to possess large spontaneous polarization and magnetism. The selected-area electron diffraction patterns indicate the coexistence of polycrystalline and nanocrystalline grains in the hot-pressed samples. Raman spectroscopic studies reveal that the Bi–O bond strain and cations (Fe3+) away from the oxygen octahedral center induce the polarization. The Fe–O bond strain, oxygen octahedral rotation around the [111] axis, and electromagnons build a long-range interaction between electrical polarization and magnetic moment reorientation to form an incommensurate spiral magnetic structure. This work clearly shows that the hot-pressed treatment can modify the structure and properties of BiFeO3 ceramics.
Journal title
Acta Tropica
Serial Year
2011
Journal title
Acta Tropica
Record number
1750159
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