Crystal structure and magnetic properties of Yb2Pt2Pb under multi-extreme conditions.

Structural and magnetic properties of the Shastry-Sutherland material Yb2Pt2Pb were studied in single-crystalline form under pressures up to 10 GPa, magnetic fields up to 17 T, and temperatures down to 0.3 K. Surprisingly robust magnetic order is observed with the Néel temperature <italic>T</italic>N = 2.1 K stable up to 8.1 GPa. Indication of an additional magnetic phase formation can be traced in resistivity data for magnetic field along the <italic>c</italic>-axis exceeding the (pressure-dependent) metamagnetic transition. The related anomaly shifts to higher temperatures with increasing field, merging <italic>T</italic>N at the tricritical point. Experiments with μ0<italic>H</italic> // [110] revealed the pressure stabilization of observed magnetic phases with respect to the magnetic field. The crystal-structure type is stable up to 10 GPa, without any sign of symmetry change, exhibiting moderate volume compressibility with bulk modulus <italic>B</italic> = 116(13) GPa, in good agreement with <italic>B</italic> = 118 GPa provided by the density functional theory. [ABSTRACT FROM AUTHOR]