Magnetic and electrical properties of the compounds

Abstract

The magnetization, a.c. susceptibility, resistivity and magnetoresistance have been measured for the invariable-unit-cell-parameter compounds. The Si substitution for Co in yields a dramatic initial increase of , whereas the 3d magnetic moment is reduced. These findings may be attributed to the strong involvement of Si p states in the hierarchy of exchange interactions. The magnetic phase transition at is of first order for the compounds with x < 0.075. For these compounds, the coexistence of metamagnetism and the quenching of spin fluctuations at are provided.

Magnetic Phase Transition in HoCo2 Alloy Studied by Emission Mössbauer Spectroscopy

“…They correspond to the fine amount of Ho-Co phases different from HoCo 2 formed during the diffusion annealing. The double peak in the ac susceptibility is in an agreement with similar measurements reported in [7] and it is ascribed to the first order transition in HoCo 2 at T C . The Mössbauer spectra taken at 293 K and 22 K are drawn in Fig.…”

Itinerant electron metamagnetism and magnetocaloric effect in Dy(Co,Si)2

“…Therefore, it is clear that there is no IEM in these Si-substituted compounds. It has been reported that in ErðCo 12x Si x Þ 2 [8] and HoðCo 12x Si x Þ 2 [11] the transition is FOT for x # 0:075 and it changes to SOT for x . 0:075: A similar variation has been observed in Alsubstituted RCo 2 compounds [9,12,13] as well.…”

Effect of static and dynamic disorder on electronic transport inRCo2compounds:Ho(AlБурков1, Bauer2, Gratz3 et al. 2008Phys. Rev. B11060View full textAdd to dashboardCite

“…26 and 27͒ alloys, where lattice parameter varies considerably. Similarly, in Ho͑Co 1−x Si x ͒ 2 diluted alloys 23 with invariable lattice parameter and in Ho͑Co 1−x Al x ͒ 2 alloys T C increases with x at the same rate, see Fig. 4͑b͒.…”

“…5. We should note that such behavior is common for many RCo 2 -based alloys, 23,26,[31][32][33][34][35] which include both,…”