A magneto-caloric thermal diode assembly includes a magneto-caloric cylinder with a plurality of magneto-caloric stages. Each of the plurality of magneto-caloric stages has a respective Curie temperature. The magneto-caloric cylinder also includes a plurality of insulation blocks and a plurality of pins. The plurality of magneto-caloric stages and the plurality of insulation blocks are distributed sequentially along an axial direction in the order of magneto-caloric stage then insulation block. One or more the plurality of pins extends along the axial direction between each magneto-caloric stage and a respective insulation block within the magneto-caloric cylinder.
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