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Physical, electrical and magnetic properties of nano-sized Co-Cr substituted magnesium ferrites

Iqbal, Muhammad Javed, Ahmad, Zahoor, Meydan, Turgut and Melikhov, Yevgen 2012. Physical, electrical and magnetic properties of nano-sized Co-Cr substituted magnesium ferrites. Journal of Applied Physics 111 (3) , 033906. 10.1063/1.3676438

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Abstract

Co-Cr substituted magnesium ferrite nanomaterials (Mg1−xCoxCrxFe2−xO4 with x = 0.0−0.5) have been prepared by the polyethylene glycol assisted micro emulsion method. X-ray diffraction analysis confirms the single-phase cubic close-packed lattice formation of synthesized materials. Hysteresis loops are measured up to field of 4 MA/m and high field region of these loops are modeled using the Law of Approach to saturation to calculate the magnetocrystalline anisotropy constant. The saturation magnetization of the samples increases initially from 148 kA/m for x = 0.0 to 299 kA/m (x = 0.3) and then decreases to 187 kA/m (x = 0.5). Curie temperature for this series is found to be in the range of 618-766 K. Room temperature resistivity increases gradually from 7.5 × 108 Ω cm (x = 0.0) to 3.47 × 109 Ω cm (x = 0.5). Additionally, dielectric measurements are carried out at room temperature in a frequency range of 100 Hz to 3 MHz. With improvement in the values of the above-mentioned properties, the synthesized materials could be suitable for potential application in some magnetic and microwave devices.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Uncontrolled Keywords: chromium compounds, cobalt compounds, Curie temperature, dielectric materials, electrical resistivity, ferrites, magnesium compounds, magnetic anisotropy, magnetic hysteresis, microemulsions, nanomagnetics, nanostructured materials, X-ray diffraction
Publisher: American Institute of Physics
ISSN: 0021-8979
Last Modified: 04 Jun 2017 03:08
URI: http://orca.cf.ac.uk/id/eprint/17278

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