Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2012-03-06
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 3 figures
Scientific paper
We show results of broadband dielectric measurements on the charge ordered, proposed to be mul- tiferroic material LuFe2O4. The temperature and frequency dependence of the complex permittivity as investigated for temperatures above and below the charge-oder transition near T_CO ~ 320 K and for frequencies up to 1 GHz can be well described by a standard equivalent-circuit model considering Maxwell-Wagner-type contacts and hopping induced AC-conductivity. No pronounced contribution of intrinsic dipolar polarization could be found and thus the ferroelectric character of the charge order in LuFe2O4 has to be questioned.
Angst Manuel
Groot Joost de
Hemberger Joachim
Niermann Daniel
Waschkowski Florian
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