Conical spiral in Tb5Sb3 compound

The magnetic ordering in the Ho5Si3 and Ho5Ge3 compounds

“…The higher temperature magnetic transition of both these intermetallics (24, 27 K, respectively) is well in trend either with the magnetic ordering temperature of 32 K found in Er 5 Ge 3 [3], as well with the type of magnetic ordering recently determined for this compound [11]. The lower-temperature magnetic ordering of both compounds has no analogs among the already known magnetic structures of the Mn 5 Si 3 -type phases: Tb 5 Si 3 [7], Tb 5 Ge 3 [8], Tb 5 Sb 3 [18], Dy 5 Si 3 [9], Dy 5 Sb 3 [19] and Er 5 Si 3 [10]. It may be moreover mentioned that, even if the nature of the p-block element is less effective in influencing the type of magnetic ordering, both the ordering temperatures of the germanide are relatively higher with respect to those of the silicide.…”

The magnetic structure of the compound Ho5Sb3

“…Due to the peculiar features of the Mn 5 Si 3 -type structure, the Hg-type rare earth sublattice plays a crucial role in the magnetic ordering of Tb 5 Sb 3 [3], Tb 5 Si 3 [4], Dy 5 Si 3 [5], Tb 5 Ge 3 [6], Dy 5 Sb 3 [7], Er 5 Si 3 [8] and Er 5 Ge 3 [9] compounds, too.…”

“…These compounds exhibit complicated magnetic structures, i.e. : conical for Tb 5 Sb 3 [3], Tb 5 Si 3 [4] and Dy 5 Si 3 [5], flat spiral for Tb 5 Ge 3 [6], amplitude sine modulated structure for Dy 5 Sb 3 [7] and collinear for Er 5 Si 3 [8], sine modulated collinear antiferromagnetic in Er 5 Ge 3 [9]. The magnetic properties and magnetic structure of Ho 5 Sb 3 have earlier been reported in the literature [10,11].…”

Magnetic structure of the Mn5Si3-type Er5Ge3 compound

“…Moreover, despite their simple formula and crystal structure, these compounds also present rather complicated magnetic structures, associated to one or both the R sublattices, i.e., conical for Tb 5 Si 3 [8], Dy 5 Si 3 [9] and Tb 5 Sb 3 [10], collinear for Er 5 Si 3 [11], flat spiral for Tb 5 Ge 3 [12], amplitude sine-modulated structure for Dy 5 Sb 3 [13] and Ho 5 Sb 3 [14].…”