The effect on dielectric losses in lithium ferrite by cerium substitution

• Published in: Journal of alloys and compounds Vol. 466; no. 1; pp. 404 - 407
• Main Authors: Verma, Vivek, Kotnala, R.K., Pandey, Vibhav, Kothari, P.C., Radhapiyari, L., Matheru, B.S.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 20.10.2008; Elsevier
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Dielectric loss and relaxation; Dielectric properties of solids and liquids; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Exact sciences and technology; Magnetization; Microstructure; Permittivity (dielectric function); Physics; Solid state reaction; X-ray diffraction; X-ray diffraction; Magnetization; Microstructure; Solid state reaction; Scanning electron microscopy; Electrical conductivity; Dielectric properties; XRD; Phase analysis; Cerium Iron Lithium Oxides Mixed; Ferrites; Dielectric losses; Permittivity; Saturation magnetization; Magnetic properties
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2007.11.056

An extensive study of magnetic and dielectric properties has been carried out on the series of cerium substituted lithium ferrite Li 0.5Ce x Fe 2.5− x O 4 ( x = 0.0–0.10 in step of 0.02) prepared by solid-state reaction technique. Phase analysis, microstructure and magnetic properties were studied by X-ray diffraction, scanning electron microscopy and vibrating sample magnetometer (VSM), respectively. Saturation magnetization value ( M s) decreases with substitution of cerium in lithium ferrite but the real part of dielectric constant value 3.4 × 10 4 obtained is maximum for the molar concentration Ce = 0.06 in Li 0.5Ce x Fe 2.5− x O 4. Resistivity of all samples is in the range 10 6–10 7 Ω cm measured by two-probe technique.