Froehlich entropy (FE) is the entropy variation of a material under an applied electric field. Under suitable hypotheses, this quantity can be calculated from the real part of the permittivity as a function of temperature. A straightforward physical interpretation correlates FE to the state-of-order of the considered physical system, when the analysis of FE gives several information about the evolution in temperature of the explored compound, especially of its phase transition features. Here we present a comprehensive review of the physical systems (dipolar liquids and nematicons, organic molecular crystals, metallic nanoparticles, inorganic disordered ferroelectrics, etc.) where this method has been used with the aim of evaluating their state-of-order on temperature. The variety of compounds where this approach was applied indicates that the estimation of the FE is a reliable tool to accomplish studies on the state-of-order of different classes of materials. Therefore, FE estimation can be considered a fruitful and trustworthy investigation technique, which can be used as an alternative to standard experimental approaches.

Calorimetry through dielectric measurements: A powerful investigation technique for condensed matter / Parravicini J., Parravicini GB.. - ELETTRONICO. - (2022), pp. 203-203. (Intervento presentato al convegno 108° Congresso Nazionale della Società Italiana di Fisica tenutosi a Milano nel 12-16 Settembre 2022).

Calorimetry through dielectric measurements: A powerful investigation technique for condensed matter

Parravicini J.
;
2022

Abstract

Froehlich entropy (FE) is the entropy variation of a material under an applied electric field. Under suitable hypotheses, this quantity can be calculated from the real part of the permittivity as a function of temperature. A straightforward physical interpretation correlates FE to the state-of-order of the considered physical system, when the analysis of FE gives several information about the evolution in temperature of the explored compound, especially of its phase transition features. Here we present a comprehensive review of the physical systems (dipolar liquids and nematicons, organic molecular crystals, metallic nanoparticles, inorganic disordered ferroelectrics, etc.) where this method has been used with the aim of evaluating their state-of-order on temperature. The variety of compounds where this approach was applied indicates that the estimation of the FE is a reliable tool to accomplish studies on the state-of-order of different classes of materials. Therefore, FE estimation can be considered a fruitful and trustworthy investigation technique, which can be used as an alternative to standard experimental approaches.
2022
108° Congresso Nazionale Società Italiana di Fisica
108° Congresso Nazionale della Società Italiana di Fisica
Milano
Parravicini J., Parravicini GB.
File in questo prodotto:
File Dimensione Formato  
atti_congresso_108(1).pdf

accesso aperto

Tipologia: Pdf editoriale (Version of record)
Licenza: Open Access
Dimensione 37.45 MB
Formato Adobe PDF
37.45 MB Adobe PDF

I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1281105
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact