Trivalent Impurities Research Articles

On the overhauser stationary effect in paramagnetic salts and semiconductors

The expressions of the parametersf K characterizing the degree of nuclei stationary orientation are obtained for the partial saturation of one of the hyperfine structure components in a paramagnetic salt (in case of the effective spin 1/2 for the electron shell) or in silicon or in germanium with a pentavalent donor or trivalent acceptor impurity. The expressions of the parametersf K are also obtained for the same partial saturation of all the hyperfine structure components. The contribution of the non-contact terms in the nuclei relaxation is taken into account for spin 1/2. The methods for measuring the parametersf K are also considered.

The properties of manganese-zinc ferrites and the physical processes governing them

The paper outlines some of the electrical and physical properties of manganese-zinc ferrites and the mechanisms by which they occur. Initial permeability is shown to depend on stoichiometry, granular structure and composition, while the temperature coefficient of permeability is shown to be controllable by the addition of small amounts of trivalent metallic impurities. The influence of composition and manufacturing conditions on the losses, Curie point and induction is examined, and a note on the high-frequency properties is included.