Abstract
The proposal involves a heat-pumping scheme based upon the first-order antiferromagnetism–ferromagnetism transition in FeRh alloy. Using the model S– T diagram for this alloy, the heat-pump cycles, are drawn up based on the transition latent heat absorption and emission when the transition is induced by applying magnetic field. The calculated values of heat coefficient ϕ for the cycles are ∼39 at Δ T=5 K and ∼30 at Δ T=10 K, where Δ T is the difference between the temperature surrounding and that of the heat receiver. These values are achieved using the comparatively low magnetic fields of ∼2×10 6 A m −1. The high values of ϕ, together with high value of cooling capacity, make it possible to consider Fe–Rh alloys as an effective magnetic heat-pump working body near the room temperature.
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