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Proceedings Paper

Ion transport in order-disorder ferroelectrics via high-frequency dielectric dispersion and NMR spectroscopy
Author(s): Galina Ovtchinnikova; Alla Sapronova
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Paper Abstract

The great interest has been shown recently in power law and universality as the properties of system formed of many interacting subunits. Among such systems are solids at 'critical points' where two or more macroscopic phases become indistinguishable. It seems that quite disparate systems behave in a remarkably similar fashion near their respective critical points - because what matters most is not the details of the microscopic interactions but rather the nature of the 'paths along which order is propagated' from one subunit to another distant subunit. These systems also exhibit power law behavior in their properties including dielectric respond on electromagnetic files. So it seems that both universality and power law reflect the fact that at critical points the interaction paths between the constituent subunits in complex systems dominate the cooperative behavior more than the detailed properties of the subunits themselves. Based on dielectric dispersion and NMR experiments this concept will be illustrated on ferroelectrics under order - disorder phase transitions.

Paper Details

Date Published: 13 June 1997
PDF: 4 pages
Proc. SPIE 3181, Dielectric and Related Phenomena: Materials Physico-Chemistry, Spectrometric Investigations, and Applications, (13 June 1997); doi: 10.1117/12.276259
Show Author Affiliations
Galina Ovtchinnikova, Moscow State Univ. (Russia)
Alla Sapronova, Moscow State Univ. (Russia)


Published in SPIE Proceedings Vol. 3181:
Dielectric and Related Phenomena: Materials Physico-Chemistry, Spectrometric Investigations, and Applications
Andrzej Wlochowicz, Editor(s)

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