Magnetic, electrical and 151Eu Mössbauer properties of EuPtGe

Abstract

The title compound was prepared from the elements in a tantalum tube at 1170 K. EuPtGe [single-crystal X-ray data: space group P2₁3, Z= 4, a= 654.63(9) pm, R₁= 0.0208, 378 F² values and 11 parameters] crystallizes with the LaIrSi type structure, an ordered ternary version of the SrSi₂ type. Magnetic susceptibility and ¹⁵¹Eu Mössbauer measurements show no magnetic order down to 4.2 K. The experimentally determined magnetic moment, µ_expc= 7.80(5)µ_B/Eu compares well with the free ion value, µ_eff= 7.94 µ/Eu for Eu²⁺, in accordance with the isomer shift δ=–10.4 mm s^–1 which is typical for divalent Eu. EuPtGe is a metallic conductor with a specific resistivity at room temperature of 145 µΩ cm.