Investigation of Cationic Distribution, Magnetic and Dielectric Properties of Cr-Substituted Mg Ferrites

• Published in: Journal of electronic materials Vol. 48; no. 2; pp. 806 - 816
• Main Authors: Anjum, Safia, Pervaiz, Maryam, Rashid, Afshan, Zia, Rehana
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.02.2019; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Chromium; Coercivity; Dielectric properties; Electronics and Microelectronics; Energy dispersive X ray spectroscopy; Ferrites; Fourier transforms; Infrared spectroscopy; Instrumentation; Lattice parameters; Magnesium; Magnetic properties; Magnetic saturation; Materials Science; Metallurgical analysis; Optical and Electronic Materials; Powder metallurgy; Remanence; Scanning electron microscopy; Solid State Physics; Spectrum analysis; Spinel; X ray spectra; spinel ferrites; magnetic properties; dielectric properties; Mg ferrites
• ISSN: 0361-5235; 1543-186X
• DOI: 10.1007/s11664-018-6767-7

A series of soft ferrites with the general formula MgCr x Fe 2− x O 4 , where x  = 0.0, 0.1, 0.2, 0.3, 0.4 and 0.5, have been fabricated using the powder metallurgy route. The comprehensive study of Cr-doped magnesium ferrite has been carried out employing different techniques. The structural, surface, elemental, magnetic and dielectric properties have been examined using x-ray diffractometry, Fourier infrared spectroscopy, scanning electron microscopy, a vibrating sample magnetometer and an inductor capacitor resistor meter, respectively. The formation of a single-phase cubic spinel structure is confirmed by x-ray diffractometry and Fourier transform infrared spectroscopy. It is revealed that the lattice constant decreases with increasing Cr content. The surface of these samples consists of nano-particles in the range of 90–175 nm, while energy dispersive x-ray spectroscopy has been subject to elemental analysis of all the samples. The saturation magnetization and remanence has a nonlinear trend with increasing Cr content, while the coercivity decreases monotonically. The dielectric properties also confirm the formation of spinel ferrites.