Susceptibility of the Rare Earth Ternary RNiSi₂and RNiGe₂Compounds

Superconductivity in Y4RuGe8 with a Vacancy-Ordered CeNiSi2-Type Superstructure

“…In addition, the rare earth element R in the AlB 2 -block [RM] with localized f electrons can interact with the conducting electrons, generating extremely large effective mass of conducting electrons 3 or complicated configurations of local magnetic moments. 4 As a result, CeNiSi 2 -type compounds RTM 2 are good candidates to study such phenomena and explore the possibility of interesting quantum properties.…”

“…RTM 2 (R = rare-earth or alkaline earth metals, T = transition metals, M = main group elements) compounds with a CeNiSi 2 -type structure span a large phase space and exhibit versatile physical properties such as superconductivity, heavy-fermion behavior, and complex magnetic orders . Certain ground states in CeNiSi 2 -type RTM 2 are also tunable by external fields or pressures where one ground state can be suppressed to induce another state. , CeNiSi 2 -type RTM 2 have an orthorhombic Cmcm space group (no.…”

“…The PbO-type block in RTM 2 has a plane of M atoms, with transition metal atoms T located above and below the plane, which is very similar to the active anti-PbO-type FeAs­(Se) layer in high-temperature iron-based superconductors where Fe atoms form a plane with As­(Se) located on both sides of the plane. In addition, the rare earth element R in the AlB 2 -block [RM] with localized f electrons can interact with the conducting electrons, generating extremely large effective mass of conducting electrons or complicated configurations of local magnetic moments . As a result, CeNiSi 2 -type compounds RTM 2 are good candidates to study such phenomena and explore the possibility of interesting quantum properties.…”

Erbium nickel disilicide, ErNiSi2

“…The existence of the phase ErNiSi 2 was first reported by Bodak & Gladyshevskii (1969) who, on the basis of X-ray powder diffraction data, established that the crystal structure adopts the orthorhombic CeNiSi 2 structure type. Analogous results were obtained by Gil et al (1994). In these investigations, any information about structural data (atomic coordinates, displacement parameters) was not presented.…”

“…Oxford Diffraction Ltd., Abingdon, Oxford, England. Parthé, E., Gelato, L., Chabot, B., Penzo, M., Cenzual, K. & Gladyshevskii, R. (1993-1994 (Niepmann et al, 1999), ScRhSi 2 , ScFeSi 2 , CeNiC 2 , ScCoC 2 and LuRuB 2 , and tetragonal HfCuSi 2 , ScCoC 2 and LaRhC 2 .…”