Electrocaloric Effect in 0.85PMN-0.15PT Thin Films Deposited by Pulsed Laser Deposition

Saranya, D and Parui, Jayanta and Krupanidhi, SB (2013) Electrocaloric Effect in 0.85PMN-0.15PT Thin Films Deposited by Pulsed Laser Deposition. In: FERROELECTRICS, 453 (1). pp. 38-43.

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Abstract

The electrocaloric effect (ECE) of 0.85PbMg(1/3)Nb(2/3)O(3-)0.15PbTiO(3) (0.85PMN-0.15PT) thin films deposited on (111) Pt/TiO2/SiO2/Si substrate by pulsed laser deposition (PLD) has been calculated. The reversible adiabatic temperature was calculated indirectly using the Maxwell's relation Delta T = -T/C rho integral(E2)(E1) (partial derivative P/partial derivative T)(sigma,E)dE. Permittivity and P-E measurements show an anomaly at 11 degrees C on heating only. This anomaly previously reported are claimed to arise due to the PNR depolarization upon heating. The absence of this anomaly during cooling suggests that no structural phase transition takes place. A negative electrocaloric effect is observed which is explained by the increase in the entropy term.

Item Type:	Journal Article
Publication:	FERROELECTRICS
Publisher:	TAYLOR & FRANCIS LTD
Additional Information:	copyright for this article belongs to TAYLOR & FRANCIS LTD, ENGLAND
Keywords:	Electrocaloric effect; relaxor ferroelectrics; PLD; thin films
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	27 Jan 2014 06:14
Last Modified:	27 Jan 2014 06:15
URI:	http://eprints.iisc.ac.in/id/eprint/48234

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