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Bhasi Nair3 Tomoyasu Usui1 Sam Crossley3 2 Xavier Moya3 Sakyo Hirose1 Neil Mathur3

3, Materials Science and Metallurgy, University of Cambridge, Cambridge, , United Kingdom
1, Murata Manufacturing Co., Ltd., Nagaokakyo-shi, Kyoto, Japan
2, Applied Physics, Stanford University, Palo Alto, California, United States

Using both thermocouples and infrared imaging, we report large electrocaloric effects in PbSc0.5Ta0.5O3 multilayer capacitors near room temperature. For field changes of 29.0 V ╬╝m-1, we find changes of temperature that peak at 5.5 K, and exceed 3 K for starting temperatures that span 176 K. This directly measured performance in a macroscopic body improves upon the magnetocaloric response of gadolinium when driven by expensive permanent magnets, suggesting the possibility of a straight swap in prototype cooling devices.

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