Structural chemistry and physical properties of the rare earth silicide Dy3Si4

Structural chemistry, magnetism and electrical properties of binary Gd silicides and Ho3Si4

“…5, shows a maximum in the real part χ (B = 1 mT) plot at T N = 16 K. Since the imaginary part is temperature-independent, this transition is attributed to an antiferromagnetic phase transition. This result corroborates with our own results for Dy 3 Si 4 (T N = 16 K) [21] and the neutron diffraction study for Tb 3 Si 4 (T N = 22 K) [35]. Assuming a de Gennes scaling of the ordering temperatures for this series of compounds, one can expect that Gd 3 Si 4 should also order antiferromagnetically, with a Néel temperature of the same order of magnitude (20-30 K).…”

“…Owing to the bad quality of the X-ray powder pattern, a Rietveld-type profile refinement was not judged as an adequate solution. Moreover, we published recently the crystal structure of Dy 3 Si 4 of Ho 3 Si 4 type, which is clearly isostructural with Gd 3 Si 4 [21] (Fig. 2b).…”

“…However, it is worth noting that the binary phase RE 3 Si 4 exists for RE = Ce, Pr, Nd, Gd, Tb, Ho, Dy, and Yb [20,21,[32][33][34][35][36]. When RE is a light rare earth metal, magnetic measurements and/or neutron diffraction experiments resulted in a ferromagnetic behavior with a Curie temperatures T C = 78 K (Ce), 105 K (Pr) and 75 K (Nd) [32][33][34].…”

“…When RE is a light rare earth metal, magnetic measurements and/or neutron diffraction experiments resulted in a ferromagnetic behavior with a Curie temperatures T C = 78 K (Ce), 105 K (Pr) and 75 K (Nd) [32][33][34]. On the contrary, when RE is a heavy rare-earth metal, the corresponding binary silicide orders antiferromagnetically at Néel temperatures T N = 22 K (Tb) [35] and 16 K (Dy) [21]. Prior to our study of the isothermal section of the ternary Ho-Si-B phase diagram at 1000 • C [37], we succeeded first to synthesize a pure sample of the binary silicide Ho 3 Si 4 , which is the prototypical compound of this structural family.…”

The ternary RE–Si–B systems (RE=Dy, Ho, Er and Y) at 1270K: Solid state phase equilibria and magnetic properties of the solid solution REB2−xSix (RE=Dy and Ho)

“…Recently, we have published the isothermal sections of the ternary systems Gd-Si-B and Nd-Si-B at the higher temperature of 1270 K [3,4]. No ternary phases in the Nd-Si-B system were found with the exception of This paper deals with the isothermal section of the ternary RE-Si-B phase diagrams (RE = Dy, Ho, Er and Y) at 1270 K. Crystal structures of RE 5 Si 3 (Mn 5 Si 3 -type, RE = Dy, Ho and Y) and Dy 3 Si 4 (Ho 3 Si 4 -type) were reported recently or will appear soon in the literature [9,10]. The X-ray single crystal structures of the binary compounds RE 5 Si 4 (Sm 5 Ge 4 -or structurally related Gd 5 Si 4 -type, RE = Dy and Ho), DySi (FeB-type) and both modifications of HoSi, i.e.…”