Crystal-structure and magnetic properties of the new ternary compound Pr117Co57Sn112

Synthesis, Crystal Structure, and Magnetic Properties of Giant Unit Cell Intermetallics R117Co52+δSn112+γ (R = Y, La, Pr, Nd, Ho)

“…Understanding the character of the disorder and its relation to the exact composition of these materials requires crystal structure refinement from single-crystal X-ray diffraction data. To date, the results of such refinements have been reported for compounds with R = Pr [25], Sm [23], Gd [27,28], Tb, and Dy [23].…”

“…In terms of physical properties, only the basic magnetism studies for R 117 Co 52+δ Sn 112+γ (R = Pr, Ce, Sm, Tb, Dy) [23][24][25]28] and Pr 117 Co 56. 7 Ge 112 [29], plus a relatively complete physical property investigation for Gd 117 Co 56 Sn 114 [27,28], have been reported.…”

The crystal structure and magnetic properties of Pr117Co56.7Ge112

“…Unlike many of the common R-M-X ternary compounds that crystallize in conventional, "small" unit cells, the compounds that belong to the R 117 M 52þx X 112þy (M ¼ Fe, Co, and Cr, X ¼ Ge, Sn) family are extraordinarily complex because their giant cubic unit cells (V > 20 000 Å 3 [2][3][4] Recently, another series of the isostructural compounds with Sn instead of Ge has been found, namely the R 117 Co 52þx Sn 1126y compounds with R ¼ Pr, Sm, Gd, Tb, and Dy. [5][6][7] Their crystal structures are nearly identical to those with Ge, but small differences have been reported.…”

“…However, until now, most reports have been limited to crystallographic studies, lacking the information about the physical properties of these compounds. To date, there are only two papers reporting the basic magnetic properties of R 117 Co 52þx Sn 1126y (R ¼ Pr, Sm, Tb, and Dy) 5,6 and one paper discussing the magnetic, transport properties, and heat capacity of Gd 117 Co 56 Sn 112 . 7 Magnetic properties of the Tb 117 Fe 52 Ge 112 -type structure family remain unknown.…”

“…Such unusual distribution of the electron density in the vicinity of these positions (expressed in the flattened and elongated ellipsoids) is the result of the low local atomic density and is typical for all of the reported compounds of this family. [5][6][7] Figure 2(a) shows the temperature variation of the magnetization of Pr 117 Co 56.7 Ge 112 measured in a 1 kOe applied field under zero-field-cooled heating (ZFC) and field-cooledcooling (FCC) conditions. The results show that there is one prominent magnetic transition at $10 K (T f1 ) and two weak magnetic anomalies at $26 K (T f2 ) and $46 K (T f3 ) under both ZFC and FCC conditions, which can be clearly seen from the temperature derivatives of the ZFC and FCC data.…”