Abstract
The metallic glass Gd 52.5 Co 18.5 Al 28 Zr 1 preserves the amorphous structure after hydrogenation at 473 K for 48 h. The absorption of hydrogen leads to the reduction of the magnetic transition temperature due to the expansion of the interatomic distance. The magnetic anisotropy is introduced and the coercivity and remanence are 352 Oe and 12.5 emu/g at 1.8 K, respectively. The maxima of magnetic entropy changes are 11.3 and 7.5 J/kg K with the magnetic field changes of 0 to 70 kOe and 0 to 50 kOe, respectively. The decline of the magnetic entropy changes can be attributed to the disappearance of the collinear ferromagnetic characteristics and the difficulty of saturation for the magnetization after hydrogenation.
Published Version
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