Magnetic ordering of Mo2NiB2-type {Gd, Tb, Dy)2Co2Al compounds by magnetization and neutron diffraction study

Magnetocaloric materials for hydrogen liquefaction

“…Silicides constitute an extensive family of interesting compounds. For instance, equiatomic ternary compounds, such as HoCoSi, 190 ErFeSi 163 or ErRuSi 191 are well-known ferromagnets with a remarkable MCE and appropriate Curie temperatures (see the curves of ErFeSi in Figure 4D). The main group of silicides are those with the general formula RM 2 Si 2 and ThCr 2 Si 2 -type crystal structure, with M = Mn, Cr, Ru, Fe, etc.…”

The Impact of the Composition Effect on Ferromagnetic Properties of Tb2Co2Ga

“…The rectangular lattice stacks along the c-axis. The isostructural Tb 2 Co 2 Al has been reported to be a ferromagnet [4] below 111 K. A neutron diffraction study [4] has clarified that Tb and Co sublattices form a c-axis ferrimagnetic ordering. The magnetic moment of Tb at 2 K is 8.86 µ B , which dominates over that of Co with 0.26 µ B .…”

“…Several ferromagnetic compounds of R 2 Co 2 Al and R 2 Co 2 Ga (R = heavy rare earth) with an orthorhombic W 2 CoB 2 (Mo 2 NiB 2 ) -type structure [1] are attractive as magnetic refrigeration materials [2][3][4][5]. Recently, we studied the orthorhombic W 3 CoB 3 -type Tb 3 Co 3 Ga that is located near Tb 2 Co 2 Ga in the ternary phase diagram [6].…”

Extending interstitial tetrelides into carbides: synthesis and crystal and electronic structures- of RE2Co2AlC (RE = La, Pr, Nd)

“…The series of RE 2 Co 2 Al and RE 2 Co 2 Ga compounds (RE = rare earth metal) with an orthorhombic W 2 CoB 2 (Mo 2 NiB 2 )-type structure, 1,2 belonging to the second largest group among the R 2 T 2 M compounds, is known to exhibit a wide variety of physical properties, such as multiple magnetic transitions, non-saturation of magnetization, and the magnetocaloric effect, and, in addition, they are of particular interest as potential hydrogen storage materials. [3][4][5][6][7][8] In many cases, the existence of compounds with a certain structure type is restricted by the valence electron concentration (VEC), in particular VEC per unit cell ranges from 26 to 30 for the W 2 CoB 2 -type compounds. 3,9 However, this criterion cannot convincingly explain the absence of the RE 2 Co 2 Al (RE = La, Ce) compounds in the respective ternary systems.…”

“…The series of RE 2 Co 2 Al and RE 2 Co 2 Ga compounds (RE = rare earth metal) with an orthorhombic W 2 CoB 2 (Mo 2 NiB 2 )-type structure, 1,2 belonging to the second largest group among the R 2 T 2 M compounds, is known to exhibit a wide variety of physical properties, such as multiple magnetic transitions, non-saturation of magnetization, and the magnetocaloric effect, and, in addition, they are of particular interest as potential hydrogen storage materials. 3–8…”