Sample shape influence on the antiferroelectric phase transitions in dipolar systems subject to an external field
- 8 January 2002
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 65 (5) , 052104
- https://doi.org/10.1103/physrevb.65.052104
Abstract
A continuous change in the macroscopic shape of a sample from a needle through a sphere to a plate is shown to greatly affect phase transitions in Ising dipolar systems. The first- and second-order phase transition lines with critical and tricritical points appear, coexist, and disappear on the phase diagram with varying sample shape. The values of the shape-dependent depolarization factor corresponding to the changes in the phase diagram are identified.Keywords
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