<abstract xmlns="http://www.w3.org/1999/xhtml">Fluorides-based perovskites are currently the typical materials being used in spintronic devices, optoelectronic and magneto-resistance colossal fields. Solar cells made of Fluoro-perovskite hold much promise for the future of solar energy. The electronic structure and magnetic properties of KFeF3, KCoF3 and KNiF3 Fluorides are studied using ab initio Calculation. We have analysed the structural phases, total and partial electronic densities and band structures within the (DFT) vs the DFT+U description. We show the Electro-Magnetic Behavior using L(S)DA+U vs L(S)DA in a comparative study of cation effect by integrating three types of crystal structures (Cubic (Pm-3m), Four-Layered Hexagonal (P6/mmc), and Orthorhombic (Pnma)). Equilibrium lattices agree very well with experimental and theoretical data. Magnetic moment of each phase is discussed. The obtained results confirmed that the three crystal structures invested here exhibit Ferromagnetic (FM) behavior. The introduction of the Hubbard’s parameter U increases lattice parameters and magnetic moment. We deduce that the second cation plays an important role in the magnetic effects. L(S)DA+U show correctly that KFeF3, KCoF3 and KNiF3 are insulators.</abstract>

Fluorides-based perovskites are currently the typical materials being used in spintronic devices, optoelectronic and magneto-resistance colossal fields. Solar cells made of Fluoro-perovskite hold much promise for the future of solar energy. The electronic structure and magnetic properties of KFeF3, KCoF3 and KNiF3 Fluorides are studied using ab initio Calculation. We have analysed the structural phases, total and partial electronic densities and band structures within the (DFT) vs the DFT+U description. We show the Electro-Magnetic Behavior using L(S)DA+U vs L(S)DA in a comparative study of cation effect by integrating three types of crystal structures (Cubic (Pm-3m), Four-Layered Hexagonal (P6/mmc), and Orthorhombic (Pnma)). Equilibrium lattices agree very well with experimental and theoretical data. Magnetic moment of each phase is discussed. The obtained results confirmed that the three crystal structures invested here exhibit Ferromagnetic (FM) behavior. The introduction of the Hubbard’s parameter U increases lattice parameters and magnetic moment. We deduce that the second cation plays an important role in the magnetic effects. L(S)DA+U show correctly that KFeF3, KCoF3 and KNiF3 are insulators.

Electro-Magnetic Behavior of Highly Correlated Fluorides KFeF3, KCoF3 and KNiF3: A Comparative <italic>Ab-initio</italic> Study of Cation Effect

Condensed Matter and Sustainable Development Laboratory

Djillali Liabès University of Sidi Bel-Abbès

Annals of West University of Timisoara - Physics

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Electro-Magnetic Behavior of Highly Correlated Fluorides KFeF, KCoF and KNiF: A Comparative  Study of Cation Effect

Fluorides-based perovskites are currently the typical materials being used in spintronic devices, optoelectronic and magneto-resistance colossal fields. Solar...

Electro-Magnetic Behavior of Highly Correlated Fluorides KFeF₃, KCoF₃ and KNiF₃: A Comparative Ab-initio Study of Cation Effect

Published Online: Dec 16, 2020

Page range: 23 - 51

Received: May 16, 2020

Accepted: Jun 01, 2020

DOI: https://doi.org/10.2478/awutp-2020-0003

Keywords
Fluorides, DFT, DFT+U, Magnetic moment, and Electronic structure

© 2020 Sihem Filalli et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Electro-Magnetic Behavior of Highly Correlated Fluorides KFeF3, KCoF3 and KNiF3: A Comparative Ab-initio Study of Cation Effect

Published Online: Dec 16, 2020

Page range: 23 - 51

Received: May 16, 2020

Accepted: Jun 01, 2020

DOI: https://doi.org/10.2478/awutp-2020-0003

KeywordsFluorides, DFT, DFT+U, Magnetic moment, and Electronic structure

© 2020 Sihem Filalli et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Electro-Magnetic Behavior of Highly Correlated Fluorides KFeF₃, KCoF₃ and KNiF₃: A Comparative Ab-initio Study of Cation Effect

Keywords
Fluorides, DFT, DFT+U, Magnetic moment, and Electronic structure