Crystalline, ferromagnetic-semiconductor and electronic features of the terbium-based cobalt-ferrite Tb2FeCoO6
| Autor: | C.E. Alarcón Suesca, D.A. Landínez Téllez, Jairo Roa-Rojas, C. E. Deluque Toro, V.R. Estrada Contreras |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Spintronics Condensed matter physics business.industry Process Chemistry and Technology 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Hysteresis Magnetization Semiconductor Ferromagnetism 0103 physical sciences Materials Chemistry Ceramics and Composites Condensed Matter::Strongly Correlated Electrons Orthorhombic crystal system Crystallite 0210 nano-technology Electronic band structure business |
| Zdroj: | Ceramics International. 47:14408-14417 |
| ISSN: | 0272-8842 |
| Popis: | Ceramic samples of Tb2FeCoO6 were synthesized by the solid-state reaction recipe. The crystallographic analysis revealed that the material crystallizes into a complex perovskite-type orthorhombic structure (space group P21/n, # 14) with octahedral distortions. The surface topography of the material was evaluated by means of scanning electron microscopy, observing densified submicrometric granular characteristics in the form of polyform sheets. Energy scattering spectra showed 98% agreement between the experimental composition and the stoichiometry of the Tb2FeCoO6 formula. The DC magnetization curves as a function of temperature exhibit irreversible behavior at low temperatures related to the distortionary character of the Fe–O6 and Co–O6 octahedra in the structure. Magnetization hysteresis curves as a function of the applied field at temperatures from 5 K up to 300 K reveal a ferromagnetic type ordering in the material. The I–V characteristic suggests a semiconductor electrical response with a varistor-type tendency and strong dependence of the polycrystalline nature of the samples. Calculations of band structure and density of electronic states predict the semiconductor characteristic for this double perovskite, with Eg = 2.48 eV and the ferromagnetic behavior is attributed to extended super-exchange spin interaction in the Fe–O–Co ions. The ferromagnetic semiconductor nature of the Tb2FeCoO6 material foresees potential applications in the novel spintronics industry. |
| Databáze: | OpenAIRE |
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