Abstract
Structural, magnetic, and magnetocaloric properties of DyNi0.67Si1.34 were investigated using X-ray powder diffraction, magnetic susceptibility, and magnetization measurements. X-ray powder diffraction pattern shows that DyNi0.67Si1.34 crystallizes in the AlB2-type hexagonal structure (space group: P6/mmm, No. 191, a=b=3.9873(9)Å, and c=3.9733(1)Å). The compound is a spin-glass with the freezing temperature TG=6.2K. The ac magnetic susceptibility measurements confirm magnetic frustration in DyNi0.67Si1.34. The maximum value of the magnetic entropy change determined from M(H) data is −16.1J/kgK at 10.5K for a field change of 70kOe.
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