Structure, magnetic and magnetocaloric properties of RE11Ge8In2 (RE = Gd–Tm)

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

“…2c). The 16m site in the cerium compound is occupied by a mixture of In and Ge atoms, that leads to the composition Ce 11 Ge 4.74 In 5.26 [14] while for heavy rare earths (R ¼ GdeTm) the 16m site is fully occupied by Ge resulting in the stoichiometry R 11 Ge 8 In 2 [13]. Table 2).…”

“…Ce 3 GeIn 4 is paramagnetic down to 1.72 K, whereas Ce 11 Ge 4 In 6 orders ferromagnetically at T c ¼ 7.5 K [14]. R 11 Ge 8 In 2 (R ¼ GdeTm) order ferromagnetically at low temperatures and for the Gd-, Tb-and Tm-samples a magnetocaloric effect was observed with the largest magnetic entropy change of DS m ¼ 10.6 J/kg K in Tm 11 Ge 8 In 2 [13].…”

“…In the ReSieIn systems the compounds: R 3 SiIn (R ¼ La, Ce; La 3 GeInetype; I4/mcm) [2,3] and R 11 Si 4 In 6 (R ¼ Y, Gd, Tb, Ho, Er; Sm 11 Ge 4 In 6 etype; I4/mmm) [1,5] were found. In the ReGeeIn systems the compounds with the compositions: R 3 GeIn (R ¼ LaeNd, Sm, Gd; La 3 GeIn-type; I4/mcm) [2e4, 9,12,13], R 3 GeIn 4 (R ¼ LaeNd; La 3 GeIn 4 etype; I4/mcm) [2,3,9,12,14], R 11 Ge 4 In 6 (R ¼ Y, La, Ce, Sm, Gd; Sm 11 Ge 4 In 6 etype; I4/mmm) [2,4,8e10,14,15] and R 11 Ge 8 In 2 (R ¼ GdeTm; Gd 11 Ge 8 In 2 -type; I4/mmm) [13], EuGeIn (own type; Pnma) [16], R 2 Ge 2 In (R ¼ Y, LaeYb; Mo 2 FeB 2 -type; P4/ mbm) [17e20] were obtained. The solid solutions R 2 Ge 2Àx Si x In (R ¼ LaeNd; 0 x 1) were also reported [21].…”

Magnetic Properties of Dy11Si4In6

“…[3] suggest complex magnetic properties. The R 11 Ge 8 In 2 (R = GdTm) compounds, which crystallize in a similar crystal structure, are ferromagnets and exhibit a large change in the magnetic entropy near the Curie temperature [4]. Here the results of DC and AC magnetic measurements and specic heat data for Dy 11 Si 4 In 6 are reported and on their basis the magnetic properties of this compound are determined.…”

“…The compounds are interesting as materials for permanent magnets or the ones with large magnetocaloric eect. The investigated in this work Dy 11 Si 4 In 6 compound belongs to the R 11 M 4 In 6 family. This compound crystallizes in the tetragonal Sm 11 Ge 4 In 6 -type structure [1].…”