Magnetic properties of DyCo10−xNixSi2 compounds

Abstract

The temperature dependence of the magnetization of DyCo 10Ϫx Ni x Si 2 compounds with xϭ0, 2, 4, and 6 was measured in fields up to 5.0 T and in the temperature range from 4.2 to 300 K in a SQUID magnetometer. Compensation temperatures were observed for the compounds with xϭ4 and 6. The values of the R-T exchange interaction obtained by fitting the M -T curves on the basis of two-sublattice molecular-field theory are compared with the values obtained from high-field magnetization measurements on powder particles free to be oriented by the applied field. In all four compounds magnetic transitions are found in the ac-susceptibility measurements which were carried out between 4.2 K and room temperature. The types of magnetic anisotropy were investigated by magnetization measurements on samples that were magnetically aligned at room temperature.

Magnetic phase transitions in compounds

“…X-ray diffraction shows that when x = 0, the c axis is the easy magnetization direction at room temperature, whereas the compounds for 0.4 x 1 have an easy-plane type of magnetization. The magnetization of NdFe 11 Ti as a function of the angle between the alignment direction and the external field of 1 T is given in figure 3 for various temperatures ranging from 10 to 300 K. This method can be used efficiently to detect the type of easy magnetization direction and the temperature of a spin-reorientation transition [15,16]. From x-ray diffraction, we can conclude that the c-axis is the EMD at room temperature.…”

Exchange interactions in Gd1−xCexMn2Ge2 compounds

“…Later works have been carried out for other 3d-4f intermetallic compounds [12][13][14][15][16][17][18][19][20][21][22][23][24][25].…”