High pressure crystal growth of the antiperovskite centrosymmetric superconductor SrPt3P

Abstract

Bulk single crystals of SrPt3P have been grown for the first time by a self-flux method at 2 GPa and 1500 °C using the cubic-anvil, high-pressure and high-temperature technique. The grown black crystals were found to have either a plate-like or pillar-like morphology with maximum dimensions of ~ 1 × 0.6 × 0.3 mm 3 . According to a goniometric study the crystals are elongated in the ab-plane with the c-axis perpendicular to the plane. The crystal structure was confirmed by Xray diffraction (P4/nmm, # 129, Z = 2, a = b = 5.7927(2) Å, c = 5.3729(2) Å and V = 180.290(11) Å 3 ). Temperature dependent susceptibility measurements showed a single-phase behaviour and a superconducting transition temperature of 8.6 K. This value for single crystals is slightly higher than that previously reported for polycrystalline SrPt3P. The sharpness of the susceptibility drop (∆Tc = 0.07 K) supports a high homogeneity of obtained crystals.

Superconducting order parameter and bosonic mode in hydrogen-substituted NdFeAsO0.6H0.36 revealed by multiple-Andreev-reflection spectroscopy

“…A pressure of 3 GPa was applied at room temperature. By keeping the pressure constant, the temperature was increased up to a maximum value of 1450 • C, maintained for 14 h, followed by cooling to room temperature in 3 h. Overall details of the experimental setup can be found in our previous publications 23,24 . X-ray measurements revealed the single-phase nature of the sample as well as the absence of a suitable amount of impurities.…”

High-pressure growth and characterization of bulk MnAs single crystals

“…A set of steel parts transmit the force through six tungsten carbide pistons to the sample in a quasi isostatic way. This method was successfully applied earlier on to grow various compounds, including superconducting intermetallic crystals [22][23][24], diamonds [25], cuprate oxides [26,27], pyrochlores [28], LnFePnO (Ln1111, Ln: lanthanide, Pn: pnictogen) oxypnictides [29][30][31], and numerous other compounds [32,33]. The limited availability of high-pressure phase diagrams is fully compensated by a number of advantages offered by the use of high-pressure conditions.…”

Chiral singlet superconductivity in the weakly correlated metal LaPt3P

“…The details of experimental setup can be found in Ref. [29]. All the work related to the sample preparation and the packing of the high pressure cell-assembly was performed in an argonfilled glove box.…”