Search

Studies the high-pressure and high-temperature synthesis of a single-phase sample of MgB[sub2]. Superconductivity of the compound; Usage of X-ray diffraction and Rietveld analysis; Identification of the structure of the sample.

The perovskite-like structure compound Ca0.85CuO2 has interesting structural properties: it has infinite one-dimensional edge-sharing copper-oxygen chains as well as partial occupancy of the Ca sites resulting in an incommensurate superstructure. In situ high-pressure energy dispersive X-ray diffraction measurements on polycrystalline powder Ca0.85CuO2 have been performed by using diamond anvil cell (DAC) instrument with synchrotron radiation. The results for the first time show that edge-sharing copper oxide Ca0.85CuO2 undergoes a structural transition at 14.5 GPa, and furthermore the structural transition is reversible. [ABSTRACT FROM AUTHOR]

Reports on in situ high pressure energy dispersive X-ray diffraction measurements on cubic-perovskite superconductor MgCNi[sub 3] under pressure up to 22 GPa using diamond anvil cell with synchrotron radiation. Crystal structure and compressibility; Stability of the structure of the superconductor.

Details the structural stability of infinite-layer (IL) CaCuO[sub 2] under high pressure. Results suggesting that the crystal structure of IL CaCuO[sub 2] is stable under pressure up to 30 GPa at room temperature; bulk modulus obtained according to Birch-Murnaghan equation of state.