Dielectric properties of Ba₂NdFeNb₄O₁₅ at temperatures between 10 K and 320 K

Abstract

The phase composition, structure, and dielectric properties of the Ba₂NdFeNb₄O₁₅ (BNFNO) multiferroic ceramics have been studied by X-ray diffraction analysis and dielectric spectroscopy. It has been shown that the material is single-phase and has a tetragonal structure with a = 12.477 Å, c = 3.923 Å, V = 611 ų unit cell parameters at room temperature. The presence of two relaxations processes has been revealed in the temperature range of 10 ÷ 325 K and frequency range of 20 ÷ 10⁶ Hz. The reasons for the revealed regularities and the prospects for using this material in the form of nanosized thin films are discussed.

Keywords:

• multiferroic
• dielectric properties
• ferroelectric relaxor

Acknowledgments

The authors acknowledge T. N. Sorokun and E. V. Glazunova (Research Institute of Physics, Southern Federal University) for help in the manufacture of Ba₂NdFeNb₄O₁₅ ceramics.

Additional information

Funding

The reported study was funded by Russian Science Foundation according to the research project No. 21-72-10180.