Gy. Mészáros

Neutron diffraction studies on liquid CCl4 and C2Cl4

Abstract Neutron diffraction (ND) is arguably the most important tool of liquid structure determination. To be able to assess the information content of ND results one should see clearly the possible effects of experimental conditions on the outcome of ND experiments. For this purpose the structure factors of two simple molecular liquids, CCl 4 and C 2 Cl 4 have been measured at two different wavelengths and then analysed by reverse Monte Carlo simulation.

Magnetic cation distribution in a nanocrystalline Fe3O4 spinel

Neutron diffraction study of nanostructured magnetite was performed at room temperature. The actual grain-size was determined from evaluation of X-ray diffraction profiles by the modified Williamson-Hall plot. The atomic structure parameters and the sublattice magnetic moments were determined using the Rietveld refinement of the neutron diffraction spectra. The sublattice magnetization at the octahedral sites decreases with decreasing grain-size, while it remains practically constant at the tetrahedral sites.