This work proposes a new design for a thermal switch that exploits the temperature dependence of a ferromagnetic material situated between a hot and cold surface. A numerical model is presented which predicts the behavior of the thermal switch. It is shown that with modifications to the physical structure, the device can be tuned to turn on at different heat source temperatures. The time-averaged heat flux and effective conductance compare favorably to existing thermal switch technologies over a range of heat source temperatures. Additionally, it is shown that the contact conductance of the surfaces has a large influence on the device performance.

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