Around the composition Gd4Co3: Structural, magnetic and magnetocaloric properties of Gd6Co4.85(2)

Stabilization by Si Substitution of the Pseudobinary Compound Gd2(Co3–xSix) with Magnetocaloric Properties around Room Temperature

“…According to X-ray powder diffraction (XRPD) the as-cast Gd 40 Co 51 Si 9 sample is not single phase: the peaks of the two known phases GdCo 2 17 (more exactly Gd(Co 2−y Si y ) with y = 0.2) and Gd 6 Co 4.85 18 are observed added to extra reflections highlighted with the * symbols in the pattern (Figure 2). This result agrees with the microprobe analysis presented in Figure 1a.…”

The new ternary silicide Gd5CoSi2: Structural, magnetic and magnetocaloric properties

“…Considering these arguments, we have recently started the investigation of the RE-Co-Si ternary systems and discovered the intermetallics RE 6 Co 1.67 Si 3 with RE=La, Ce, Nd, Gd, Tb and Dy [5], [6], [7], [8] and [9]. These ternary silicides crystallize in an hexagonal structure [7] deriving from that of the binary compound Gd 6 Co 4.85 [10] and no solid solution between these two last intermetallics was evidenced. The RE 6 Co 1.67 Si 3 compounds exhibit interesting magnetic properties: (i) Gd 6 Co 1.67 Si 3 orders ferromagnetically at 294 K, a Curie temperature comparable to that observed for pure gadolinium and exhibits a reversible second-order magnetic transition inducing a remarkable MCE [6], [11], [12] and [13] and (ii) two successive ferro(ferri)magnetic transitions appear below T C =84 and 186 K for Nd 6 Co 1.67 Si 3 and Tb 6 Co 1.67 Si 3 , respectively [8], [9], [11], [14], [15], [16] and [17].…”

Tunable Curie temperatures in Gd alloyed Fe–B–Cr magnetocaloric materials

“…Fe 80 B 12 Cr 8 amorphous alloys were recently reported to exhibit promising MCE near room temperature and the corrosion resistance is enhanced by Cr [21]. Other studies show that rare earth based amorphous alloys exhibit large magnetocaloric response, but their working temperatures are much lower than room temperature [22][23][24][25][26][27][28]. MCM exhibit maximum MCE around their T C .…”