Magnetocaloric effect in the ternary silicide Gd3NiSi2

Magnetocaloric properties of a novel ferromagnet Gd3Co4+xAl12−x (x = 0.50)

“…The exchanged entropy exhibits a maximum at about 38 K reaching 1.5 and 2.9 J kg À1 K À1 in the 0e1 T and 0e2 T magnetic field ranges, respectively. These performance are far below the giant EMC rareearth based materials such as Gd 5 Si 2 Ge 2 [21] or La(Fe,Si) 13 [22] but compares well with Gd-based compounds recently reported for their magnetocaloric properties such as GdAl 2 [23], GdScX (X ¼ Si, Ge) [24], Gd 7 Pd 3 [25], GdCoNi [26], GdCr 2 Si 2 [27], Gd 3 Co 29 Ge 4 B 10 [28], Gd 6 Mn 23 [29], Gd 3 NiSi 2 [30], GdCo 3 B 2 [31] or GdNi 4 Si [32], the weight magnetic entropy change being slightly larger in our aluminide than all these compounds but the last three ones, despite a much smaller rare earth atomic ratio.…”

Structural chemistry and magnetic properties of R11M4In6 (R=Gd, Tb, Dy, Ho, Er, Y; M=Si, Ge) compounds

“…7b). The maximum magnetic entropy change of 16.5 J/kg K is higher than the one reported for Tm 11 Ge 8 In 2 [13], Gd 3 NiSi 2 [26], Gd 3 CoSi 2 [27], Gd 6 Co 4.85 [28] but lower when compared to 36 J/kg K found for Gd 5 Si 2 Ge 2 [29] or 24.4 J/kg K for LaFe 11.6 Si 1.4 [30]. A large magnetocaloric effect is observed also in NieGdeAl metallic glasses [31].…”

Magnetic ordering of novel La3NiGe2-type R3CoGe2 compounds (R = Pr, Nd, Sm, Gd–Dy)

“…3). The maximum |DS| value is lower than those observed for isostructural Gd 3 NiGe 2 and Gd 3 NiSi 2 [7,8] (Table 1). …”

“…Insertion of the transition metal and p-element atoms into the Mg-type rare-earth structure leads to an orthorhombic distortion of this structure and formation of the La 3 NiGe 2 structure. Such transformation from the rare-earth structure to that of La 3 NiGe 2 results in the change of their magnetic properties: the Ce, Pr and Nd substructures in R 3 CoGe 2 exhibit ferromagnetic orderings (in addition to lowertemperature antiferromagnetic ones for the Ce and Nd compounds) [4,5] while only antiferromagnetic transitions are present in elemental Ce, Pr, Nd [6], and the magnetic ordering temperatures of the Gd 3 NiSi 2 and Gd 3 NiGe 2 [7,8] are lower than that of pure Gd [9] (Table 1). …”