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Nonvolatile Control of Magnetocaloric Operating Temperature by Low Voltage
Jiahong Wen1, Xiaoyu Zhao1, Qian Li1
1National Laboratory of Solid State Microstructures and Jiangsu Key Laboratory for Nano Technology , Nanjing University , Nanjing 210093 , P.R. China.
Abstract:
The limited operating temperature is the main obstacle for the practical applications of magnetic refrigeration. In this work, the voltage control of magnetocaloric effect (MCE) is investigated in a La0.7Sr0.3MnO3 (LSMO)/CeO2/Pt device. Different from the conventional method of volatile manipulating MCE by large-voltage-induced strain, nonvolatile manipulation of magnetocaloric operating temperature with good stability is realized in the LSMO film by applying low voltages of less than 2.3 V. The experimental results demonstrate that the magnetic entropy change peak temperature for the LSMO film can be extended from 302 to 312 K by voltage. This nonvolatile effect can be well-understood with the resistive switching mechanism and has potential in promoting microscale refrigeration technology.
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