首页|Magnetocaloric properties of Nd-doped Gd5Si4 microparticles and nanopowders
Magnetocaloric properties of Nd-doped Gd5Si4 microparticles and nanopowders
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The preparation of materials with enhanced magnetocaloric properties is crucial for magnetic refrigeration.In this study,Nd-doped Gd5Si4 microparticles and nanomaterials were synthesized using the reduction-diffusion method.The impact of Nd doping with varying compositions on the structure and entropy change properties of the materials was investi-gated.The Curie temperatures of both the micron-and nano-sized materials ranged from 190 K to 210 K,which were lower than previously reported values.Micron-sized samples doped with 1％Nd exhibited superior magnetocaloric properties,demonstrating a maximum entropy change of 4.98 J·kg-1·K-1 at 5 T,with an entropy change exceeding 4 J·kg-1·K-1 over a wide temperature range of approximately 70 K.Conversely,the nanomaterials had broader entropy change peaks but lower values.All samples exhibited a second-order phase transition,as confirmed by the Arrott plots.
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