Crystal and Magnetic Structures of the Ternary HoNiSi and HoNiGe Compounds: An Example of Intermetallics Crystallizing with the ZrNiP Prototype.

We report two new rare-earth (R) ternary intermetallic compounds-HoNiT with T = Si and Ge-that correspond to the RNiT phase earlier reported to form in Dy-Ni-T and Ho-Ni-T ternary systems. The compounds crystallize in a filled version of the orthorhombic ZrNiP-type structure with = 0.52; their stoichiometry, determined from both single-crystal and powder X-ray diffraction data, is centered on HoNiT with a narrow solid solubility range for the silicide, while the germanide appears to be a line phase.

Mn-induced Fermi-surface reconstruction in the SmFeAsO parent compound.

The electronic ground state of iron-based materials is unusually sensitive to electronic correlations. Among others, its delicate balance is profoundly affected by the insertion of magnetic impurities in the FeAs layers. Here, we address the effects of Fe-to-Mn substitution in the non-superconducting Sm-1111 pnictide parent compound via a comparative study of SmFe[Formula: see text]Mn[Formula: see text]AsO samples with [Formula: see text] 0.

Magnetic ground states of CeTiSb, PrTiSband NdTiSbdetermined by neutron powder diffraction and magnetic measurements.

TheTiSbternary compounds, witha light rare earth (La to Sm) have been reported to crystallize with the anti-HfCuSn-type hexagonal structure (Pearson's symbol18; space-group6/, N. 193). An early article that reported possible superconductivity in some of these intermetallic phases (namely those with= La, Ce, and Nd) caught our attention.

Mn substitution effect on the local structure of La(FeMn)AsO studied by temperature dependent x-ray absorption measurements.

The local structure of La(FeMn)AsO has been investigated using temperature dependent Fe K-edge extended x-ray absorption fine structure (EXAFS) measurements. The EXAFS data reveal distinct behavior of Fe-As and Fe-Fe atomic displacements with a clear boundary between⩽ 0.02 and> 0.