Recent Developments in Condensed Matter Physics

These volumes contain the invited and contributed talks of the first general Conference of the Condensed Matter Division of the European Physical Society, which took place at the campus of the University of Antwerpen

1. Phase Changes.- Rotational Motion of NH4+ in NH4MnCl3 Compared to NH4MnF3: Heat Capacity Measurements.- Jahn-Teller Induced Phase Transitions in CsCrCl3 and RbCrCl3 Perovskites.- Study of the Raman Active Modes for the Suzuki Phase in Doped Alkali Halides.- A Novel Kinetic Melting Criterion and Its Observable Consequences.- Freezing into Simple Cubic and hcp Monatomic Solids.- Pyroelectric Effect and Ferroelectric Phase Transition in BixSb1-xSI.- Phase Changes in Metallic Mn3GaC: Heat Capacity Measurements.- Optical Birefringence in Deuterated Thiourea CS(ND2)2 in the Incommensurate Phase.- Phase Diagram of Extended Hubbard Model with Intraatomic Attraction.- Effect of Heat Release on the Motion of Phase Boundaries.- Isotropic-Nematic Transition in Liquid Crystals.- Central Peak and Critical Dynamics of the Transverse Ising Model above Tc*.- Birefringence Study of BaMnF4.- Spin Reorientation Transition in Gadolinium.- Landau-de Gennes Model of First Order Transitions.- 2. Phonons and Soft Phonons.- Dielectric Screening and Phonon Frequencies of Silicon.- Ferroelectric Mode and Phase Transitions in KNbO3.- The Critical Behaviour of Ferroelectric Triglycineselenate Investigated with the X-Ray Double Crystal Diffractometer AMADEUS.- Temperature Dependence of Polar Optical Phonons in the Cubic Phase of BaTiO3 and SrTiO3.- Acoustic Phonons in Inhomogeneous Materials.- Brillouin Effect and Microelastic Behaviour in Orthorombic KNbO3.- 3. Low-Dimensional Systems.- Magnetic Solitons in Antiferromagnetic Chains: Neutron and NMR Experiments in TMMC.- A New Variational Principle and the Quantum Statistics of the ?4-Soliton.- Solitons in a Chain with “Reasonable” Interaction.- Spin Waves in the Pseudo 1-d Ferromagnetic RbFeCl3.- Evidence of 3D Ant iferromagnetic Order in the S = 1/2 Linear Ferromagnet TMCUC.- Microhardness and X-Ray Diffraction Studies of n-Propyl Qn(TCNQ)2 Crystals after Neutron Irradiation.- Brillouin Scattering down to 0.3 K in Polymers.- Cis-Trans Isomerization Study of Polyacetylene Films.- Intermediate Electronic States in Kronig-Penney Models.- 4. Spin Waves and Magnetism.- New Light on Magnetic Contributions to the Thermal Expansion of Transition Metal Magnets.- Thermal Spontaneous Magnetization in Y2Ni7.- Spin Susceptibility of a Random System of Antiferromagnetically Coupled Spins: Application to Impure Silicon.- Magnetic Susceptibility of Antiferromagnetic Chromium in the Vicinity of the Spin Flip Temperature.- Excitation Spectrum of Magnetic Impurities in Metals.- Dynamics of Magnetic Moments and 4f Charges in Intermediate Valence Compounds.- Physical Properties of BaVS3 and Their Dependence on Stoichiometry.- 5. Experimental Techniques.- Study of the Anharmonic Self-Energy of the Transverse Optic Mode in CsI at 77 and 300 K by Dispersive Fourier Transform Spectrometry.- Physics of Ferroelectric Fluids: The Discovery of a High-Speed Electro-Optic Switching Process in Liquid Crystals.- The Application of Rutherford Backscattering Technique to Dental Hard Tissue.- Resonance Detector as a New Tool for High Energy Transfer Inelastic Neutron Scattering Investigations.- 6. Superionic Conductors.- Phase Transition from Low-Temperature Normal Phase to High-Temperature Superionic Phase in the System Studied by Means of X-Ray Diffraction.- Dielectric Experiments on Concentrated Solutions of XF2:R3+.- 7. Hydrogen in Metals.- Lattice Dynamics of LaNi5 and Low-Energy Excitations of Deuterium in LaNi5D6.- Low Temperature Order-Disorder Transitions in Palladium Deuteride.- Chemical Binding Energy of a Pair of Hydrogen Atoms in Palladium.- Trends in the Electron-Phonon Coupling Parameter in Some Metal Hydrides.- Ferromagnetic Resonance in Hydrogenated/Dehydrogenated LaNi5 and FeTi.- 8. Superconductivity.- Electronic States of Small ? Superconducting Alloys.- Magnetic Properties of a Superconducting Film.- Electromagnetic Pinning in the Inhomogeneous Superconductors.- A Systematic Investigation of the Structure and Superconducting Properties of Nb3Ge Prepared in a UHV System.- Influence of Dissipative Processes on the Dispersion of Surface Plasmons in Superconductors.- Influence of the Quasiparticle Lifetime on the Surface Impedance of Superconducting Nb3Sn.- 9. Fluids.- Stationary and Nonstationary Flow of He II.- Self-Trapped Excitations in Solid and Liquid Helium.- Author Index.