12017-61-7Relevant articles and documents
Achieving a table-like magnetic entropy change across the ice point of water with tailorable temperature range in Gd-Co-based amorphous hybrids
Ma,Gan,Chan,Ding,Xia
, p. 197 - 200 (2017/07/03)
Alloys exhibiting table-like magnetic entropy change (?ΔSm) profiles are regarded as ideal magnetic refrigerants for the Ericsson magnetic refrigeration cycle. In this work, we fabricated two Gd-Co-based amorphous hybrids using various combinations of Gd50Co50, Gd50Co48Fe2, Gd50Co48Mn2 and Gd50Co45Mn5 amorphous ribbons with Curie temperatures ranging from 245 K to 278 K, and obtained table-like ?ΔSm profiles across the ice point of water within different temperature ranges. The maximum ?ΔSm and refrigeration capacity of the amorphous hybrids were higher than those of other amorphous alloys or composites with flattened ?ΔSm values near room temperature, indicating that amorphous hybrids are good candidates for magnetic refrigerants in house-hold magnetic refrigerators.
Tunable thermal hysteresis in CoGd alloys
Demirtas,Camley,Koymen
, p. 1 - 3 (2008/10/09)
We show that tunable magnetic thermal hysteresis can be realized for a simple ferrimagnetic CoGd alloy. The magnetization of a Co0.8 Gd0.2 alloy shows a bow-tie curve as a function of temperature, which indicates supercooled and superheated phase transitions. The width of the magnetic thermal hysteresis can be tuned by an external magnetic field, with values of 190 K at fields near 100 Oe and values of 20 K near 400 Oe. Experimental results are in reasonable agreement with theoretical calculations.