Citation:
T M Correia, S Kar-Narayan, J S Young, J F Scott, N D Mathur, R W Whatmore and Q Zhang, PST thin films for electrocaloric coolers, Journal of Physics D: Applied Physics, Volume 44, Number 16, 2011, Paper Number: 165407
Abstract:
Relaxor behaviour in a thin film of partially ordered PbSc0.5Ta0.5O3 (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 -3.5 °C to -6.9 °C over a broad range of operating
temperatures near room temperature (1-127 °C), 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 temperatu