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PST thin films for electrocaloric coolers

Abstract : Relaxor behaviour in a thin film of partially ordered PbSc 0.5 Ta 0.5 O 3 (PST) was confirmed via slim P-E loops and the frequency dependence of the temperature at which the dielectric constant is maximum. Indirect measurements of the electrocaloric effect suggest that removing a field of 774 kV cm -1 yields a temperature change of -3.5ºC to -6.9ºC over a broad range of operating temperatures near room temperature (1 ºC-127 ºC), with a correspondingly large refrigerant capacity of 662 J kg -1. In addition to low electrical hysteresis, there is negligible thermal hysteresis. PST thin films are therefore promising for EC cooling near room temperature.
Keywords : Physical Sciences
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Submitted on : Thursday, August 4, 2011 - 3:39:54 AM
Last modification on : Friday, April 9, 2021 - 10:16:04 AM
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T M Correia, S Kar-Narayan, J S young, J F Scott, N D Mathur, et al.. PST thin films for electrocaloric coolers. Journal of Physics D: Applied Physics, IOP Publishing, 2011, 44 (16), pp.165407. ⟨10.1088/0022-3727/44/16/165407⟩. ⟨hal-00613273⟩

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