Mössbauer study of HhpfSn in the Heusler alloy Co2MnSn under pressure

Abstract

The pressure dependence of the ‘‘hyperfine magnetic field’’- Hhpf at the nuclei of the diamagnetic atoms 119Sn was investigated in the Heusler alloy Co2MnSn using Mössbauer absorption spectroscopy with pressures up to 10 GPa at room temperature. The dependence can be fitted by the linear function HhpfSn(P)/HhpfSn(0)=1+k1⋅P with coefficient k1=−0.023 ±0.002 GPa−1, where HhpfSn(0)=10.5±0.3 T. Diamond anvil cells were used for the high pressure generation. A drop of HhpfSn in the pressure range 0–10 GPa can be explained on the basis of empirical theory developed by Delyagin, Krylov, and Nesterov [JETP 76, 8, 1050 (1980)].