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Regular version of the site

Article

Dielectric and magnetic properties of nanocomposites based on opal matrixes, phosphates and vanadates of metals

Materials Science Forum. 2019. Vol. 970. P. 100-106.
Belyanin A., Bagdasaryan S., Bagdasaryan A., Yurin A., Surzhikov A.

Opal matrix is a regular 3D-packing of spherical particles of amorphous SiO2, forming an
ordered system of voids. Opal matrixes with spherical particles of SiO2 diameter d ≈ 260 nm
(Δd ≈ 2 %) were synthesized. The frequency dependences of the conductivity, real and imaginary
components of the dielectric and magnetic conductivity of nanocomposites containing crystallites
16–65 nm in size of magnetic materials ‒ double phosphates (LiNiPO4, LiCoPO4) and vanadates
(GdVO4 and DyVO4) were measured. The dielectric losses of nanocomposites remain low (at a
level of ~ 0.06) in the frequency range 107–1010 Hz for nanocomposites with DyVO4 and LiCoPO4.
The dielectric loss increases both in the direction of low frequencies (< 106 Hz) and in the direction
of THz frequencies.