UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

The frequency dependent response of the electrical impedance of UO2

Hampton, RN; Saunders, GA; Stoneham, AM; (1986) The frequency dependent response of the electrical impedance of UO2. Journal of Nuclear Materials , 139 (3) 185 - 190. 10.1016/0022-3115(86)90171-6. Green open access

[img]
Preview
PDF
59673.pdf

Download (459kB)

Abstract

AC impedance techniques in the frequency range 5 Hz to 5 MHz have been employed to measure dielectric properties of single crystal UO2 in the form of plate specimens. The dielectric constant has been measured down to 4 K, giving results consistent with previous reports. Both barrier and volume effects have been shown to contribute to the measured impedances. The barrier effects account for the anomalously large capacitances observed in previous attempts to measure the dielectric constant by the conventional plate technique. Activation energies for carriers in both boundary and bulk regions are similar (0.18 to 0.25 eV). The behaviour is consistent with the presence of electronic holes present in the concentrations to be expected from small deviations from stoichiometry.

Type: Article
Title: The frequency dependent response of the electrical impedance of UO2
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/0022-3115(86)90171-6
Publisher version: http://dx.doi.org/10.1016/0022-3115(86)90171-6
Language: English
Additional information: Text made available to UCL Discovery by kind permission of Elsevier B.V., 2012
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/59673
Downloads since deposit
213Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item