Abstract
Magnetocapacitance and magnetization behavior as a function of reduction heat treatment at 650°C and 900°C in a 5%H2–Ar atmosphere on LiNbO3 nanocrystalline are reported. There is a change of intrinsic dielectric constant (κ) from 822 to 860 produced by spin polarization using an external magnetic field. The Raman, X-ray photoelectron spectroscopy and electron paramagnetic resonance spectroscopy, indicate vibration mode changes localized at Nb–O bonds in the octahedron NbO6, shifts in the binding energy of the electronic structure of ions of niobium (3d) and the oxygen (1s). It is due to the oxygen vacancies caused by reduction heat treatment process. Moreover there is ions redistribution of Nb+3, Nb+4and Nb+5 at the surface of the nanoparticles.
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