Related Experiment Video
Updated: May 18, 2026

In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries
Published on: November 10, 2014
Dielectric properties of charge-ordered LuFe(2)O(4) revisited: the apparent influence of contacts
D Niermann1, F Waschkowski, J de Groot
1II. Physikalisches Institut, Universität zu Köln, D-50937 Köln, Germany.
Abstract:
We show results of broadband dielectric measurements on the charge ordered, proposed to be multiferroic material LuFe(2)O(4). The temperature and frequency dependence of the complex permittivity as investigated for temperatures above and below the charge-order 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 LuFe(2)O(4) has to be questioned.
Related Concept Videos
The Electrical Double Layer
Dielectric Polarization in a Capacitor
Electrostatic Boundary Conditions in Dielectrics
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity.
Electrochemical Systems
Potential Due to a Polarized Object
Theory of Strong Electrolytes

