Magnetic and magnetocaloric properties of spin-glass material DyNi0.67Si1.34

Abstract

Structural, magnetic and magnetocaloric properties of DyNi 0.67 Si 1.34 were investigated using x-ray powder diffraction, magnetic susceptibility and magnetization measurements. X-ray powder diffraction pattern shows that DyNi 0.67 Si 1.4 crystallizes in the AlB 2-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 T G = 6.2 K. The ac magnetic susceptibility measurements confirm magnetic frustration in DyNi 0.67 Si 1.34. The maximum value of the magnetic entropy change determined from M(H) data is-16.1 J/kg K at 10.5 K for a field change of 70 kOe.

Effect of Electronic Correlations on the Electronic Structure, Magnetic and Optical Properties of the Ternary RCuGe Compounds with R = Tb, Dy, Ho, Er

“…Ternary intermetallic compounds of the RTX series with R = rare-earth metal, T = d metal, X = p element, were studied intensively during the last years, see recent reviews [ 1 , 2 , 3 , 4 ]. A number of interesting magnetic and electric properties of practical and fundamental importance were found in different compounds of the RTX series, including magnetocaloric effect (MCE) [ 5 ] of giant [ 6 , 7 , 8 , 9 , 10 ] and large [ 11 , 12 , 13 ] magnitude and magnetoresistance, an antiferromagnetic to ferromagnetic order transition [ 14 , 15 ] and rich magnetic transition phase diagram [ 16 , 17 , 18 ]. Very recently, another promising application of some RXT was revealed as intermetallic electrides [ 19 , 20 ].…”