The Praseodymium is known to have a singular behavior in the family of cuprate superconductors of high critical temperature of the type RE-123. When these cuprates are doped with Praseodymium apparently critical temperature ...

In recent years the necessity of new devices, in the electroelectronic industry, has lead to an increasing interest in materials called magnetoelectric (ME) or multiferroic (MF). Multiferroic is the term used to classify ...

Lead titanate zirconate modified with lanthanum, or PLZT, is one the most ferroelectric compounds utilized in electronic devices, due to its versatility and low production costs in comparison with single-crystalline ...

One of the most studied high TC superconductor is the YBa2Cu3O7 (Y-123) as well as the different substitutions on the Y site for different rare earth elements. Generally, this does not show important effects on the magnetic ...

In this work we used the technique of scattering matrix to calculate the transmissivity of polarized spins in a semiconductor symmetrical double-barrier heterostruture. The dynamics of carriers is described by effective ...

In this dissertation we presente a study on the entanglement between two identical and noninteracting two-level atoms, generated by their interaction with only a singl cavity filed mode. We also show how to calculate the ...

In this thesis we study the interaction between an atom and a cavity mode submitted to linear and parametric amplifications. The evolution operator of the system was derived through the technique of time-dependent ...

In this work it was investigated some fundamental properties of undoped and Borondoped (p-type) synthetic diamond films. It was investigated the influence of the cleaning process on the surface s quality in order to ...

The processing of lead metaniobate (PN) ferroelectric ceramics was optimized, therefore, in this work, the main details to obtain PN ceramics with density higher than 96 % of the ideal density are presented and ...

In this work it was investigated, by using Raman spectroscopy, the effect of the substitucional disorder on the vibrational properties of the ferroelectric ceramics PbTiO3 doped with Samarium, at different temperatures ...