Electrocaloric effect

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<Font color="blue"> Effet électrocalorifique </Font> (''Fr'').  
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<font color="blue">Effet électrocalorique</font> (''Fr''). <font color="red">Elektrokalorischer Effekt</font> (''Ge''). <font color="black">Effetto electrocalorico</font> (''It''). <font color="green">Efecto electrocalórico</font> (''Sp'').
== Definition ==
== Definition ==
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The electrocaloric effect is the converse of the pyroelectric effect: it describes the variation of entropy &delta;&sigma; of a material submitted to an electrical field ''E<sub>i</sub> '':
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The electrocaloric effect is the converse of the pyroelectric effect: it describes the variation of entropy &delta;&sigma; of a material submitted to an applied electrical field ''E<sub>i</sub> '':
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''&delta;&sigma;'' =  ''p<sub>i</sub><sup>T</sup>'' ''E<sub>i</sub> ''
''&delta;&sigma;'' =  ''p<sub>i</sub><sup>T</sup>'' ''E<sub>i</sub> ''
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where ''p<sub>i</sub><sup>T</sup>'' is the electrocaloric coefficient at constant stress. It is equal to the pyroelectric coefficient.
where ''p<sub>i</sub><sup>T</sup>'' is the electrocaloric coefficient at constant stress. It is equal to the pyroelectric coefficient.
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== See [[pyroelectricity]] ==
 
== See also ==
== See also ==
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*[[Pyroelectricity]]
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*[http://www.iucr.org/iucr-top/comm/cteach/pamphlets/18/ ''An introduction to crystal physics'']  (Teaching Pamphlet No. 18 of the International Union of Crystallography)
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*Chapters 1.1.4 and Part 3 of ''International Tables for Crystallography, Volume D''
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[http://www.iucr.org/iucr-top/comm/cteach/pamphlets/18/ An introduction to crystal physics]  (Teaching Pamphlet of the ''International Union of Crystallography'')<br>
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[[Category:Physical properties of crystals]]
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Section 10.2 of ''International Tables of Crystallography, Volume A''<br>
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Section 1.1.4 and part 3 of ''International Tables of Crystallography, Volume D''
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[[Category:Physical properties of crystals]]<br>
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Latest revision as of 16:12, 29 November 2017

Effet électrocalorique (Fr). Elektrokalorischer Effekt (Ge). Effetto electrocalorico (It). Efecto electrocalórico (Sp).

Definition

The electrocaloric effect is the converse of the pyroelectric effect: it describes the variation of entropy δσ of a material submitted to an applied electrical field Ei :

δσ = piT Ei

where piT is the electrocaloric coefficient at constant stress. It is equal to the pyroelectric coefficient.

See also