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Journal of the Korean Physical Society

, Volume 64, Issue 11, pp 1701–1706 | Cite as

Effects of structural distortion induced by Sc substitution in LuFe2O4

  • Jinwon Jeong
  • Han-Jin NohEmail author
  • Sung Baek Kim
Article

Abstract

We have studied the correlation between the structural distortion and the electronic/magnetic properties in single-crystalline (Lu,Sc)Fe2O4 (Sc = 0.05 and 0.3) by using X-ray diffraction (XRD), magnetic susceptibility, and X-ray absorption spectroscopy (XAS)/X-ray magnetic circular dichroism (XMCD) measurements. The Rietveld structure analysis of the XRD patterns revealed that the Sc substitution induced an elongation of the FeO5 bipyramidal cages in LuFe2O4 and increased the Fe2O4 bilayer thickness. A non-negligible decrease in the ferrimagnetic transition temperature T C is observed in the magnetic susceptibility curve of the Sc = 0.3 sample, but the XAS/XMCD spectra do not show any difference except for a small reduction of dichroism signals at the Fe3+absorption edge. We interpret this suppression of TC to be the result of a decreased spin-orbit coupling effect in the Fe2+ e 1g doublet under D 3h symmetry, which is induced by the weakened structural asymmetry of the FeO5 bipyramids.

Keywords

LuFe2O4 Lattice distortion Spin-orbit coupling 

PACS numbers

75.25.-j 75.47.Lx 78.70.Dm 

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Copyright information

© The Korean Physical Society 2014

Authors and Affiliations

  1. 1.Department of PhysicsChonnam National UniversityGwangjuKorea
  2. 2.Advancement for College Education CenterKonyang UniversityNonsanKorea

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