Phonon dispersion relations in PrBa2Cu3O6+x (x≈0.2) -: art. no. 092302
PHYSICAL REVIEW B 69:9 (2004) ARTN 092302
Resonant soft energy X-ray diffraction of charge, spin and orbital ordering
ADV SOLID STATE PHYS 44 (2004) 467-478
X-ray, optical and dielectric studies of diffused phase transitions in NaNbO3-based solid solution crystals
FERROELECTRICS 298 (2004) 261-265
Abstract:
In flux-grown (1-x)NaNbO3 -(x)Gd1/3NbO3 solid solution crystals a diffusion of the dielectric permittivity epsilon maximum grows with x and increases dramatically when x exceeds a threshold value x 0 approximate to 0.1. Optical studies by the rotating-polarizer method show that Gd-doping results in a very small mean size of twins and the distribution of the birefringence image becomes very messy. In the x < x(0) range the changes of lattice parameters and birefringence corresponding to the epsilon(T) anomaly were revealed. The results obtained are in line with the assumption that phase transition diffusion in NaNbO3 is a result of the local strains stemmed from the impurities.Ferromagnetic in-plane spin fluctuations in NaxCoO2 observed by neutron inelastic scattering
(2003)
Magnetic Studies of Polycrystalline and Single-Crystal NaxCoO2
ArXiv cond-mat/0312493 (2003)