The electrically driven adiabatic changes of temperature that may be achieved in the archetypal electrocaloric material PbSc0.5Ta0.5O3 are identified by comparing the isothermal changes of electrical polarization that arise when an applied field is varied slowly with the adiabatic changes of electrical polarization that arise when the applied field is varied quickly. By obtaining these electrical polarization data at many nearby starting temperatures, every 0.3 K, we find that a maximum temperature change of ~1.7 K arises due to a maximum field change of 26 kV cm-1, for starting temperatures 298-310 K. This quasi indirect method of measurement is compared with the well known indirect, quasi-direct and direct methods, and may become routine in the study of electrocaloric materials.

中文翻译：

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通过比较绝热和等温电极化数据，准间接测量 PbSc0.5Ta0.5O3 中的电热温度变化

在原型电热材料 PbSc0.5Ta0.5O3 中可能实现的电驱动绝热温度变化是通过比较当外加场缓慢变化时出现的电极化等温变化与在应用领域变化很快。通过在许多附近的起始温度（每 0.3 K）获得这些电极化数据，我们发现，对于 298-310 K 的起始温度，由于 26 kV cm-1 的最大场变化，会产生 ~1.7 K 的最大温度变化。这准间接测量法与众所周知的间接法、准直接法和直接法相比，可能成为电热材料研究的常规方法。