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Details for article 30 of 127 found articles
| Title: |
Dielectric discontinuities and multipolar interactions in ferroelectric perovskites |
| Author: |
Noheda, Beatriz Koralewski, Marceli Lifante, Gines Gonzalo, Julio A. |
| Appeared in: |
Ferroelectrics letters section |
| Paging: | Volume 17 (1994) nr. 1-2 pages 25-31 |
| Year: |
1994-02-01 |
| Contents: |
Ferroelectric perovskites, in particular KNbO3, PbTiO3 and BaTiO3, are characterized by discontinuities in the dielectric constant at the tetragonal-cubic transition (T*) as well as by the abrupt disappearance of the spontaneous polarization which goes from a minimum finite value Ps* =Ps (T) to zero at T=T*. It is shown that, taking into account quadrupolar and higher order terms into the effective field acting on the elementary dipoles lattice, good fits to the observed Ps(T) in a wide temperature range below T* and to the inverse dielectric constant discontinuity (C/Tc)[ε+-1(T*)-ε--1(T*)] at T⋍T* are obtained for these three perovskites. |
| Publisher: |
Taylor & Francis |
| Source file: |
Elektronische Wetenschappelijke Tijdschriften |
Details for article 30 of 127 found articles
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