Effect of misfit strain on the electrocaloric effect of P(VDF-TrFE) copolymer thin films J. H. Qiu, J.N. Ding, N.Y. Yuan, X.Q. Wang and J. Yang Eur. Phys. J. B, 84 1 (2011) 25-28 Published online: 26 October 2011 DOI: 10.1140/epjb/e2011-20674-y