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Negative bulk modulus and possibility of loss of elastic stability near tricritical transitions in thin films on substrates

Levanyuk, A. P. and Minyukov, S. A. and Mısırlıoğlu, Burç (2016) Negative bulk modulus and possibility of loss of elastic stability near tricritical transitions in thin films on substrates. Ferroelectrics, 500 (1). pp. 116-128. ISSN 0015-0193 (Print) 1563-5112 (Online)

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Official URL: http://dx.doi.org/10.1080/00150193.2016.1236608

Abstract

Within the Landau-like approach we study anomalies of elastic moduli at phase transitions in thin films on substrates. We consider the case where, similar to many experimental cases, the first-order transition in free crystal would convert into a second order in the film if the system remained homogeneous. It is shown, however, that apart from its questionable thermodynamic advantages, the homogeneous state of low-symmetry phase may become absolutely unstable which is signaled by changing of sign of its bulk modulus.

Item Type:Article
Uncontrolled Keywords:Films on substrates, phase transition anomalies, elastic moduli
Subjects:Q Science > QC Physics > QC1 General
Q Science > QC Physics > QC310.15 Thermodynamics
Q Science > QC Physics > QC176-176.9 Solids. Solid state physics
ID Code:30711
Deposited By:Burç Mısırlıoğlu
Deposited On:08 Nov 2016 10:40
Last Modified:08 Nov 2016 10:40

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