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

Alexey F. Belyanin, Sergey A. Bagdasaryan, Alexander S. Bagdasaryan, Alexander I. Yurin, Anatoly P. Surzhikov

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Pages (from-to)100-106
Number of pages7
JournalMaterials Science Forum
Volume970
DOIs
Publication statusPublished - 2019

Keywords

  • Dielectric and magnetic properties
  • Double phosphates of Li and Ni(Co)
  • Nanocomposites
  • Opal matrices
  • Vanadates of Gd and Dy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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