Relaxation Process in Ferroelectrics near the Curie Temperature

DOMAIN-WALL RELAXATION NEAR THE CURIE TEMPERATURE OF UNIAXIAL GdCl3

The kinetic coefficient associated with the domain-wall motion exhibits a critical speeding up close to T,. Damping by longitudinal spin-spin-relaxation within "linear" walls is proposed to explain this intrinsic phenomenon. The present understanding of structure, formation and dynamics of ferromagnetic domains is still incomplete. In essence, the difficulties arise from the nonlocal and anisot...

MAGNETIC PERMEABILITY AFTEREFFECT IN FeNiSiB AMORPHOUS ALLOYS NEAR THE CURIE TEMPERATURE

The temperature dependence of the magnetic aftereffect, ABIB, has been investigated between room temperature and T, in two low-T, FeNiSiB amorphous alloys. ABIB is observed to steadily decrease with T in a region near T,, where the magnetic permeability stays almost constant. The results are analysed in terms of the structural model for the aftereffect. Introduction sive technique [I]. The samp...

Curie temperature of multiphase nanostructures

On the Dielectric Curie-weiss Law and Diffuse Phase Transition in Ferroelectrics

A simple derivation of parabolic i/Er-T curves is obtained by reconsidering the origin of the dielectric Curie-Weiss law. The only assumption needed is the introduction of a non-linear temperature dependance of the macroscopic dielectric polarization in the macroscopic Clausius-Mossotti equation.

Oscillatory curie temperature of two-dimensional ferromagnets.

The effective exchange interactions of magnetic overlayers Fe/Cu(001) and Co/Cu(001) covered by a Cu-cap layer of varying thickness were calculated in real space from first principles. The effective two-dimensional Heisenberg Hamiltonian was constructed and used to estimate magnon dispersion laws, spin-wave stiffness constants, and overlayer Curie temperatures within the mean-field and random-p...