Magnetic, dielectric and optical properties of Al-, Mg-, Co- and Zn-ion–doped CuCrO2

I. N. Apostolova; A. T. Apostolov; J. M. Wesselinowa

doi:10.1209/0295-5075/133/47003

All issues

Volume 133 / No 4 (February 2021)

EPL, 133 4 (2021) 47003

Abstract

Issue		EPL Volume 133, Number 4, February 2021


Article Number		47003
Number of page(s)		5
Section		Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI		https://doi.org/10.1209/0295-5075/133/47003
Published online		30 March 2021

EPL, 133 (2021) 47003

Magnetic, dielectric and optical properties of Al-, Mg-, Co- and Zn-ion–doped CuCrO₂

I. N. Apostolova¹, A. T. Apostolov² and J. M. Wesselinowa³^(a)

¹ University of Forestry - 1756 Sofia, Bulgaria
² University of Architecture, Civil Engineering and Geodesy - 1046 Sofia, Bulgaria
³ University of Sofia - 1164 Sofia, Bulgaria

^(a) julia@phys.uni-sofia.bg (corresponding author)

Received: 30 September 2020
Accepted: 26 January 2021

Abstract

The effects of Al, Mg, Co and Zn ion doping on different properties of multiferroic CuCrO₂ are studied using a microscopic model and the Green's function technique. The temperature dependence of the dielectric constant $\epsilon'_{ab}$ shows a kink near T_N. For Al ion doping $\epsilon'_{ab}$ decreases, for Co it increases, whereas for Mg it has a maximum for $x\sim 0.1$ . $\epsilon'_{ab}$ decreases with increasing magnetic field h_ab. The magnetization M is reduced with enhancing the Al and Zn doping concentration, whereas by Mg doping M shows a maximum at $x \sim 0.1$ . The band gap E_g increases weakly for Zn doping. It decreases strongly with increasing Co and slightly with increasing Mg doping, which is in good quantitative agreement with the experimental data.

PACS: 75.85.+t – Magnetoelectric effects, multiferroics / 77.22.-d – Dielectric properties of solids and liquids / 75.10.-b – General theory and models of magnetic ordering

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