Variation in the dielectric and magnetic characteristics of multiferroic LuFeO3 as a result of cobalt substitution at Fe sites

0574333 - ÚFM 2024 RIV CH eng J - Journal Article
Polat, O. - Coskun, M. - Yildirim, Y. - Roupcová, Pavla - Sobola, D. - Sen, C. - Durmus, Z. - Caglar, M. - Turut, A.
Variation in the dielectric and magnetic characteristics of multiferroic LuFeO3 as a result of cobalt substitution at Fe sites.
Journal of Alloys and Compounds. Roč. 963, NOV (2023), č. článku 170939. ISSN 0925-8388. E-ISSN 1873-4669
Research Infrastructure: CzechNanoLab - 90110
Institutional support: RVO:68081723
Keywords : Solid-state reactionLuFeO3Co dopingDielectric propertiesConductivityMagnetic properties * LuFeO3 * Co doping * Dielectric properties * Conductivity * Magnetic properties
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 6.2, year: 2022
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S0925838823022429?via%3Dihub

Due to its electrical, magnetic, and optical characteristics, LuFeO3 (LFO) has caught the scientific community's interest. In this study, the powders of LFO, LuFe0.95Co0.05O3, and LuFe0.90Co0.10O3 samples were prepared by using the well-known solid-state approach. The crystalline structure of the fabricated samples was examined by an X-ray diffractometer (XRD). It was found that the samples display secondary phases such as Lu2O3, Lutetium Tetraoxodiferrate, and Wustite. It was shown by scanning electron microscope (SEM) that particle size decreases with Co doping. X-ray photoelectron spectroscopy (XPS) determined oxidation states for Fe and Co. It was presented that Fe has a mixture of 2 + and + 3 valance states in the LFO sample. Although LuFe0.95Co0.05O3 has only the 3 + state, LuFe0.90Co0.10O3 sample has coexisting metallic and 3 + states. The conductivity and dielectric constant of the undoped LFO sample were higher than those of Co doped LFO samples. A decrease in both the dielectric constant and conductivity was associated with a lack of Fe2+ ions and lattice distortions. Furthermore, it was argued that several conduction models must be developed to explain the conduction process in the analyzed samples. Magnetic experiments using a vibrating sample magnetometer (VSM) revealed that Co doping raises Mr values. We discuss that this increase in Mr values could be related to i) variations in the inclined angles of Fe3+ moments and ii) the growth of magnetocrystalline anisotropy's energy.
Permanent Link: https://hdl.handle.net/11104/0344674