Recent Developments in Condensed Matter Physics

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 inthe 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.