Difference between revisions of "Electrocaloric effect"
From Online Dictionary of Crystallography
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== Definition == | == Definition == | ||
| − | The electrocaloric effect is the converse of the pyroelectric effect: it describes the variation of entropy δσ of a material submitted to an electrical field ''E<sub>i</sub> '': | + | 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 ''E<sub>i</sub> '': |
<center> | <center> | ||
''δσ'' = ''p<sub>i</sub><sup>T</sup>'' ''E<sub>i</sub> '' | ''δσ'' = ''p<sub>i</sub><sup>T</sup>'' ''E<sub>i</sub> '' | ||
Revision as of 09:34, 12 January 2007
Effet électrocalorifique (Fr).
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 pyroelectricity
See also
An introduction to crystal physics (Teaching Pamphlet of the International Union of Crystallography)
Section 10.2 of International Tables of Crystallography, Volume A
Section 1.1.4 and part 3 of International Tables of Crystallography, Volume D