摘要：Non-equiatomic high-entropy alloys(HEAs),the second-generation multi-phase HEAs,have been recently reported with outstanding properties that surpass the typical limits of conventional alloys and/or the first-generation equiatomic single-phase *** magnetocaloric HEAs,non-equiatomic(Gd_(36)Tb_(20)Co_(20)Al_(24))100−xFex microwires,with Curie temperatures up to 108 K,overcome the typical low temperature limit of rare-earth-containing HEAs(which typically concentrate lower than around 60 K).For alloys with x=2 and 3,they possess some nanocrystals,though very minor,which offers a widening in the Curie temperature *** this work,we further optimize the magnetocaloric responses of x=3 microwires by microstructural control using the current annealing *** this processing method,the precipitation of nanocrystals within the amorphous matrix leads to a phase compositional difference in the *** multi-phase character leads to challenges in rescaling the magnetocaloric curves,which is overcome by using two reference temperatures during the scaling *** phase composition difference increases with increasing current density,whereby within a certain range,the working temperature span broadens and simultaneously offers relative cooling power values that are at least 2-fold larger than many reported conventional magnetocaloric alloys,both single amorphous phase or multi-phase character(amorphous and nanocrystalline).Among the amorphous rare-earth-containing HEAs,our work increases the working temperature beyond the typical<60 K limit while maintaining a comparable magnetocaloric *** demonstrates that microstructural control is a feasible way,in addition to appropriate compositional design selection,to optimize the magnetocaloric effect of HEAs.