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.
Regulation of electronic structure and mobility cut-on rate in two-dimensional transition metal dichalcogenides (TMDs) has attracted much attention because of its potential in electronic device design. The anisotropic Raman scattering and mobility cut-on rate of monolayer unique distorted-1T(1Td) ReS2 with external strain are determined theoretically based on the density function theory. The angle-dependent Raman spectrum of Ag-like, Eg-like and Cp models are used to discriminate and analysis structural anisotropy; the strain is exploited to adjust the structural symmetry and electronic structure of ReS2 so as to enhance mobility cut-on rate to almost 6 times of the original value. Our results suggest the use of the strain engineering in high-quality semiconductor switch device.
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