Chemical Reduction of Nd1.85Ce0.15CuO4−δPowders in Supercritical Sodium Ammonia Solutions

Yasmin Dias, Hui Wang, Haiqing Zhou, Feng Lin, Yucheng Lan
2015 Advances in Condensed Matter Physics  
Nd1.85Ce0.15CuO4−δpowders are chemically reduced in supercritical sodium ammonia solutions from room temperature to 350°C. The crystallographic structure of the reduced powders is investigated from Rietveld refinement of X-ray powder diffraction. The atomic positions are maintained constant within experimental errors while temperature factors of all atoms increase significantly after the chemical treatments, especially of Nd/Ce atoms. The ammonothermally reduced Nd1.85Ce0.15CuO4−δpowders show
more » ... amagnetic below 24 K which is contributed to the lower oxygen content and higher temperature factors of atoms in the treated compound. The ammonothermal method paves a new way to reduce oxides in supercritical solutions near room temperature.
doi:10.1155/2015/873972 fatcat:6y3c23i32ngq5gcvnffcttsul4