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The Effect of Fe Addition on the Curie Temperature and Magnetic Entropy of the Gd 45 Co 50 Al 5 Amorphous Alloy.

Luyi LiBenzhen TangWeijie FuYing LuYunqing FuDing DingLei XiaPeng Yu
Published in: Materials (Basel, Switzerland) (2023)
The new magnetic refrigeration (MR) technology, which uses the magnetocaloric effect (MCE) of materials for refrigeration, has shown apparent advantages over the compression refrigeration of freon and other gases. Therefore, how to obtain materials with excellent magnetic entropy change near room temperature is of great significance for the realization of MR. In order to achieve high Tc of a Gd-based amorphous alloy, Gd 45 Co 50 Al 5 amorphous alloy with good room temperature MCE was selected, and a series of Gd 45 Co 50-x Fe x Al 5 (x = 2, 5, 10) amorphous alloys were prepared by adding Fe instead of Co. In this paper, the effect of Fe addition on the Curie temperature, and the magnetic entropy change in the alloys, were studied thoroughly. The results show that the Curie temperature is increased to 281 K by adding 5% Fe elements, which is mainly related to the enhanced 3 d -3 d interaction of transition elements caused by Fe addition, and the maximum value of magnetic entropy change is 3.24 J/(kg·K) under a field of 5 T. The results are expected to provide guidance for further improving the room temperature MCE of Gd-based amorphous alloys.
Keyphrases
  • room temperature
  • molecularly imprinted
  • ionic liquid
  • metal organic framework
  • aqueous solution
  • visible light
  • mass spectrometry
  • high resolution
  • liquid chromatography