Study of the features of the scattering of laser radiation in nanopowders Ni-Zn ferrites.

What is it about?

Ni-Zn ferrites are one of the important elements of modern nanoelectronics. A feature of the structure of their crystals is the presence of two types of sublattices (octahedral and tetrahedral), interconnected through oxygen ions. Oxygen ions provide a link and initiation of electronic exchange processes between the ions of the transition elements located in these sublattices. A weak magnetic field, arising as a result of electronic exchange processes, as shown by previous studies, affects the magnetic properties of ferrites. It is natural to assume that the presence of a weak magnetic sublattice should lead to features of the scattering of laser radiation in nanopowders of Ni-Zn ferrites. However, for this it is necessary to have sufficiently complete information about the spectrum of crystal lattice vibrations. Our experimental results are in good agreement with the available theoretical studies. In the spectra obtained, we found some maxima, which are quite possibly corresponding to vibrations of a weak magnetic sublattice.

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Why is it important?

The importance of this work is connected not only with the study of the possibility of using Ni-Zn ferrites in the terahertz region of the spectrum, but also with the explanation of the nature of the observed features in the spectra of electron paramagnetic resonance, magnetoresistance, and others discovered earlier.

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