Tuning Magnetocaloric Effect in Ternary FeRh-Based Alloys by Slight Doping

This paper presents the results of measuring the structural, magnetic, and caloric properties of the (Fe,Ru)Rh alloy. This compound has demonstrated a new record of the reversible magnetocaloric effect ( |Δ T|_ad under cycling = 7.1 K for B = 1.95 T ). We provide a classification of the results for the family of FeRh-based compounds. The analysis of these results allows us to put forward the mechanisms that lead to a change in the magnetocaloric effect value at low doping.