Structural, Dielectric, and Magnetic Studies of ZnCuFe2O4 Nanoparticles

The zinc copper ferrite nanoparticles were synthesized via hydrothermal method. Further, the X-ray diffraction patterns confirmed the formation of cubic spinel structure. The microstructure was analyzed using the FESEM and TEM study. The results revealed that the symmetrical and asymmetrical nanospheres were found in the surface morphology. The dielectric studies indicated that the behavior of dielectric constant and dielectric loss as a function of frequency and composition. In addition, the Maxwell-Wagner interfacial polarization was observed. Similarly, the ac-electrical conductivity behavior was well understood. The M-H loops indicated the ferromagnetic behavior of ZnCu ferrite samples.

Влияние легирования ванадием на термоэлектрические свойства сплавов Гейслера Fe-=SUB=-2-=/SUB=-Ti-=SUB=-1-x-=/SUB=-V-=SUB=-x-=/SUB=-Sn

In this work the results of an experimental study of Fe2Ti1-xVxSn alloys (x = 0; 0.06; 0.15; 0.2) are presented. According to the temperature dependencies of the electrical conductivity, Seebeck coefficient and thermal conductivity, it is established, that the studied compositions exhibit transport properties typical for semiconductors. The substitution of V at the Ti site leads to a change of the p-type electrical conductivity behavior to n-type; the pristine sample of Fe2TiSn has the best thermoelectric properties.