Magnetic refrigeration Gd-based material with platform type magnetic entropy change curve as well as preparation and application of magnetic refrigeration Gd-based material

The invention discloses a magnetic refrigeration Gd-based material with a platform type magnetic entropy change curve as well as preparation and application of the magnetic refrigeration Gd-based material. The composite material is a Gd-based amorphous and crystal Gd composite material, the chemical general formula is GdxMnyMaNb, M and N are two of Fe, Ni, Al, Co, Cu, In and Zr, in the formula, x is larger than or equal to 70 and smaller than or equal to 90, x + y + a + b = 100, and x: y = 5-25. The composite material has an extremely wide platform-shaped magnetic entropy change curve and is a magnetic refrigeration material with excellent magnetocaloric performance, excellent refrigeration performance and a wide working temperature zone, the maximum magnetic entropy change value under the maximum external field of 5T is not lower than 3.0 J kg K , the working temperature zone is not lower than 180K, and the refrigeration capacity is not lower than 700J kg . 本发明公开了一种具有平台型磁熵变曲线的磁制冷Gd基材料及其制备与应用。