Correia, T. M.Kar-Narayan, S.Young, J. S.Scott, J. F.Mathur, N. D.Whatmore, Roger W.Zhang, Qi2011-06-022011-06-022011-04-07T 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: 1654070022-3727http://dx.doi.org/10.1088/0022-3727/44/16/165407http://dspace.lib.cranfield.ac.uk/handle/1826/5449Relaxor 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 temperatuen-UKArticle