Kondo effect and crystal-field effect in CeNi2Sn2

On the low-temperature thermal properties and low-energy Fermi excitations in CeNiSn

“…This theory seems to be applicable to CeNiSn although the CEF splitting was not detected in this system whereas it was detected in the isostructural CePtSn compound [7]. Nevertheless we can refer to the nearest in chemical composition tetragonal CeNi2Sn2 compound where an extremely small value of AczF~17K was observed [23]. So we can hope that the crystal field produced by the Ni-Sn environment on a Ce ion in orthorhombic coordination is also weak enough, and (1) is valid for the CeNiSn system.…”

Spin gap and antiferromagnetic correlations in the Kondo insulator CeNiSn

“…In view of the dipole selection rule for magnetic neutron scattering, this indicates that the magnetic fluctuations are primarily polarized along the a axis which, from the bulk susceptibility data [3], is also the easy magnetic , where phase separation is less likely. We suspect that the bulge, which accounts for an entropy loss of 8xlO~3/?ln2 is due to the antiferromagnetic phase transition [19] in a small amount of CeNi2Sn2 produced during zone refinement, (b) Resistivity along b axis. Solid curve corresponds to Eq.…”

Hyperfine Interactions and Spin Correlations in ErT2Sn2(T = Ni, Cu) Phases

“…Until recently systematic studies were concentrated predominantly on families of compounds with silicon and germanium as an X-element. Only recently the interest was extended onto physical properties of tin containing phases [2][3][4]. Nevertheless, the research efforts have been practically confined to compounds incorporating cerium as the RE-constituent as they were found to be an intriguing playground for competing of a RKKY long-range magnetic interaction and a formation of a nonmagnetic singlet ground state [5,6].…”