Electric field tuning of magnetocaloric effect in FeRh0.96Pd0.04/PMN-PT composite near room temperature

The first-order magnetic phase transition alloy, FeRh, exhibits a large magnetocaloric effect well above room temperature and works in a limited refrigeration temperature region, which hinders its application to some extent. In the present work, we report a remarkable electric-control magnetocaloric...

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Bibliographic Details
Published in:Applied physics letters 2017-05, Vol.110 (22)
Main Authors: Hu, Q. B., Li, J., Wang, C. C., Zhou, Z. J., Cao, Q. Q., Zhou, T. J., Wang, D. H., Du, Y. W.
Format: Article
Language:English
Subjects:
Applied physics
Crystals
Electric fields
Phase transitions
Refrigeration
Room temperature
Transition temperature
Tuning
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Summary:The first-order magnetic phase transition alloy, FeRh, exhibits a large magnetocaloric effect well above room temperature and works in a limited refrigeration temperature region, which hinders its application to some extent. In the present work, we report a remarkable electric-control magnetocaloric effect in the FeRh0.96Pd0.04/PMN-PT composite near room temperature through strain-mediated magnetoelectric coupling. By applying an electric field of 8 kV/cm, the metamagnetic phase transition temperature of the FeRh0.96Pd0.04 film shifts from 300 to 325 K. As a result, the refrigeration temperature region is broadened from 35 to 47 K. These results indicate that applying multiple driving fields is an effective method for tuning the magnetocaloric effect.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4984901