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PbZr0.95Ti0.05O3 thin film is the best electrocaloric effect material which has cooling ΔT per unit field (MV m−1) about 0.254 under electric field shift ΔE = 30 kV cm−1 at Curie temperature Tc = 222 °C [A. S. Mischenko, Q. Zhang, J. F. Scott, R. W. Whatmore, N. D. Mathur, Science 311, 1270 (2006)]. Here, it is shown that an EC effect due to applied electric field shift parallel to the c-axis in SrxBa1−xNb2O6 single crystals thin film has a value of cooling per unit field larger than PbZr0.95Ti0.05O3 thin film. Furthermore, SrxBa1−xNb2O6 single crystals have Curie temperature Tc closer to room temperature.

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