Special Issue "Entropy in Shape Memory Alloys"
A special issue of Entropy (ISSN 1099-4300).
Deadline for manuscript submissions: closed (25 September 2014).
Interests: phase transitions in solids; thermal; magnetic and electric porperties of solids; multifunctional materials; giant caloric effects and magnetic shape memory
Shape memory alloys are capable of recovering from very large deformations when heated above a certain temperature. Such a peculiar porperty is a consequence of a structural phase transition (martensitic transition) between an open cubic phase and a lower symmetry closer packed phase. The relative phase stability between these structures is, to a large extent, controlled by their entropy difference. In recent years, a new family of shape alloys have been discovered, magnetic shape memory alloys, in which shape change can be achieved by magnetic field. A strong coupling between structural and magnetic degrees of freedom occurs in these alloys, and spin contributions to the solid entropy plays a crucial role. In addition to the unique mechanical properties, very recently it has been shown that shape memory alloys are also good candidates for environment friendly solid-state refrigeration. Giant caloric properties such as magnetocaloric, elastocaloric and barocaloric effects have been reported for many of these alloys, where the key feature for the effect to be giant is the large entropy change that can be induced by application of an external field (magnetic or mechanical), which is the result of the entropy difference of the two structural phases involved in the martensitic transition. We welcome submissions addressing any aspect related to entropy in the martensitic transition of shape memory alloys.
Specific topics of interest include (but are not limited to):
- relative phase stability
- electronic and phonon densities of states
- magnetostructural coupling
- magnetocaloric effects
- mechanic-caloric (barocaloric and elastocaloric) effects
- kinetic arrest
Prof. Dr. Lluís Mañosa
Manuscript Submission Information
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- martensitic transition
- relative phase stability
- shape memory and magnetic shape memory
- magnetocaloric, barocaloric and elastocaloric effects
- vibrational, electronic and magnetic contributions to entropy