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American Institute of Physics, Applied Physics Letters, 24(98), p. 242902

DOI: 10.1063/1.3595344

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Enhanced cooling capacities of ferroelectric materials at morphotropic phase boundaries

Journal article published in 2011 by Rami Chukka, Jun Wei Cheah, Zuhuang Chen, P. Yang, S. Shannigrahi, Junling Wang ORCID, Lang Chen
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

The electrocaloric properties of PbZr0.52Ti0.48O3(PZT) epitaxial films and 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 (0.7PMN-0.3PT) single crystals are measured and demonstrated enhanced low temperature refrigeration at morphotropic phase boundary compositions. The results reveal large adiabatic cooling figures in ~260nm PZT films (11 K in 15 V) and 200μm thick 0.7PMN-0.3PT single crystals (2.7 K in 240 V) at Curie transition temperatures and secondary cooling peaks at lower temperatures, near critical points. This is a very useful aspect of ferroelectric cooling elements to attain effective cooling over wide range of working temperatures in solid-state devices.