Abstract
Features of the behavior of phase transition temperature in nanoscale ferroics are discussed within phenomenological theories. It is shown that the critical temperature can shift considerably upon second-order transitions to both the commensurate and incommensurate phases, depending on the characteristic dimensions of a sample and its surface properties. It is shown that the effects of size in materials with a first-order phase transition strongly influence the process of nucleation, shifting the temperature of a phase transition or even changing its type.
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ACKNOWLEDGMENTS
The authors are grateful to Professor L.N. Korotkov for his useful advice on crystals with incommensurate phases.
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Translated by D. Zabolotny
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Nechaev, V.N., Shuba, A.V. Effects of Size on Phase Transitions in Ferroics. Bull. Russ. Acad. Sci. Phys. 87, 1270–1277 (2023). https://doi.org/10.3103/S1062873823703148
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DOI: https://doi.org/10.3103/S1062873823703148