Crystallographical and morphological changes in charge-ordering transition of RFe2O4 (R: Y, Lu) investigated by transmission electron microscopy

Y. Horibe, S. Mori, N. Ikeda, K. Yoshii, H. Maeno, Y. Murakami

Research output: Contribution to journalArticlepeer-review

Abstract

Temperature dependence of charge-ordered crystal structures and domain structures in RFe2O4 (R: Y and Lu) was investigated by energy-filtered transmission electron microscopy, combined with conventional transmission electron microscopy. The presence of three-dimensional to two-dimensional charge ordering transition were observed in both YFe2O4 and LuFe2O4 on heating. Furthermore, real-space images obtained with the energy-filtered transmission electron microscopy revealed that YFe2O4 has less anisotropic nanometer-scale charge-ordered domains than LuFe2O4. These findings in RFe2O4 indicate the importance of the interchange interactions between Fe-O bilayers in addition to those within bilayers in the structural phase transitions associated with charge ordering in this system.

Original languageEnglish
Pages (from-to)20-30
Number of pages11
JournalFerroelectrics
Volume584
Issue number1
DOIs
Publication statusPublished - 2021

Keywords

  • Bilayer ferrite
  • bright- and dark-field imaging
  • diffuse scattering
  • electron diffraction
  • energy-filtered transmission electron microscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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