LLB Sientific Report 1999-2000

Introduction

Magnetism and Superconductivity

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• Magnetism in pure and doped Sr2RuO4
• Staggered field effect on the one-dimensional S=1/2 antiferromagnet Yb4As3
• Spin dynamics and magnetic order near the field-induced quantum critical point in Pr2CuO4
• Proximity effects in Fe(1-x)Cox/Mn/Fe(1-x)Cox trilayers
• Spin dansity in a cyano-bridged molecular based ordered magnetic compound

Structures and Phase Transitions

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• Influence of substitution and stoichiometry on the structural properties of RM5-type hydride forming compounds
• Structural changes in single-wall carbon nanotube bundles under pressure
• Neutral ionic transitions as the condensation and ordering of charge-transfer excitons-strings
• Influence of the pollutant gases on the structure and dynamics of the ice surface implications for the environnement
• Phonon and magnon dispersion of BCC-iron to 10GPa

Desordered Systems and Material Science

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• Dispersion forces in simple fluids probed by neutron diffraction
• Neutron scattering study of sulphur-tellurium liquid alloys: structural evidence for a closed loop miscibility gap
• Structure of glassforming liquids confined in mesoporous materials
• Distribution of the radial strain component over the cross section of a railway wheel
• Hydration kinetics of cement paste followed by quasi-elastic neutron scattering

Chemical Physics

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• Structural properties of hellical self-assembled polymers with hydrogen-bonding

Biology

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• Dynamics of two-dimensionally condensed water on hydroxylated chromium(III) oxide surface
• Towards an understanding of the intramolecular signal transduction through enzymes 3D structure
• Biofunctional assemblies at lipid interfaces through recombinant spherical bacterial protein

Technical and Instrumental Developments

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• Modification of the thermal beam tube 2T
• Improvement of the 2T triple axis spectrometer
• Measurement of the viscosities and densities of silicate melts by dynamic neutron imaging
• Microstrip gas detectors
• Neutron energy analysis using gratings
• A new generation of software to control spectrometers

Experimental Programme and User Activities

Publications