Research on the physical properties of LiMn0.5Fe2O4 spinel ferrites by the combination of optical, magnetic, and dielectric behaviors

• Published in: RSC advances Vol. 13; no. 14; pp. 9260 - 9272
• Main Authors: Soudani, Ibtihel, Khawla Ben Brahim, Oueslati, Abderrazek, Aydi, Abdelhedi, Kamel Khirouni, Benali, A, Dhahri, E, Valente, M A
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 20.03.2023; The Royal Society of Chemistry
• Subjects: Antiferromagnetism; Chemistry; Dielectric loss; Dielectric properties; Ferrites; Ferromagnetism; Hysteresis loops; Magnetic properties; Optical properties; Physical properties; Raman spectroscopy; Vibration analysis
• ISSN: 2046-2069; 2046-2069
• DOI: 10.1039/d3ra00985h

Ferrite compounds have recently attracted significant interest because of their multifunctional properties. This work investigates the optical, magnetic, and dielectric properties of a LiMn0.5Fe2O4 ferrite prepared by a solid-state reaction. Raman spectroscopy analysis substantiated the presence of the 5 active modes representing the vibration of the oxygen anion at both tetrahedral and octahedral sites. The direct optical band gap was estimated to be 3.51 eV, which indicates the semiconductor behavior of the compound. A theoretical modulation of the hysteresis loop was done to confirm the dominance of the ferromagnetic contribution over the antiferromagnetic one. Furthermore, the dielectric permittivity result indicated a colossal value of the order of 103. The dielectric losses are characterized by the Giuntini law to extract the relaxation process, which is hidden by the DC-conductivity process. Our results indicate the potential of LiMn0.5Fe2O4 for applications in multifunctional devices.