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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Khoo, K.L. Dissado, L.A. Fothergill, J.C. Youngs, J. |
| Copyright Year | 2004 |
| Description | Author affiliation: Dept. of Eng., Leicester Univ., UK (Khoo, K.L.; Dissado, L.A.; Fothergill, J.C.) |
| Abstract | The charge-compensating sodium ions that reside interstitially in the one-dimensional tunnels of the hollandite Na/sub x/(Ti/sub 8-x/Cr/sub x/)O/sub 16/ are used as a simple model for a fluid. Molecular dynamics are used to calculate the motions of the ions at a range of temperatures between 200 K and 373 K. The polarization response of the system to a step-up electric field is calculated for field strengths between 7.43 MV/m and 74.3 GV/m, and converted to an ac susceptibility. Resonance absorption is found, peaking at frequencies between 4.5/spl times/10/sup 10/ and 8.8/spl times/10/sup 10/ Hz at 297 K. The origin of the response is shown to be the anharmonically coupled ion vibrations damped by ion hopping to neighbouring sites. The relationship of the result to the experimentally observed Poley absorption is explored, and a brief comparison of the calculated dynamics to previous theoretical models is made. |
| Sponsorship | IEEE Dielectrics and Elec. Insulation Soc |
| Starting Page | 550 |
| Ending Page | 553 |
| File Size | 281411 |
| Page Count | 4 |
| File Format | |
| ISBN | 0780383486 |
| DOI | 10.1109/ICSD.2004.1350490 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2004-07-05 |
| Publisher Place | France |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Frequency Absorption Chromium Dielectric materials Lattices Temperature Kinetic energy Oxidation Counting circuits Dielectric liquids |
| Content Type | Text |
| Resource Type | Article |
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