Mechanical, optical and high-temperature magnetic properties of Sn-substituted Mg–Zn ferrites

ABSTRACT

Sn-substituted Mg–Zn ferrites (0 ≤ x ≤ 0.10) have been synthesized using conventional ceramic technique and the mechanical, optical and high-temperature magnetic properties were studied. The formalism of elastic constants was assessed based on FTIR data. The mechanical stability was confirmed from the obtained values of stiffness constants. The bulk modulus, shear modulus and Young’s modulus have been estimated for different Sn concentrations. The Poisson’s ratio and Pugh ratio confirmed the brittleness character of the studied compounds. The Debye temperature was also calculated. The optical band gap has been calculated from diffuse reflectance spectra. The magnetization curves measured at different temperatures revealed the significant effect of temperature on the magnetic properties of the considered compositions. A second-order phase transition of ferrimagnetic to paramagnetic phase was observed in temperature-dependent magnetization vs. applied field and magnetic moment curves. The Curie temperature was observed to decrease owing to Sn substitution.

KEYWORDS:

• FTIR spectroscopy
• mechanical behavior
• optical band gap
• temperature-dependent magnetization
• phase transition

Acknowledgments

The authors are grateful to the Directorate of Research and Extension, Chittagong University of Engineering and Technology, Chattogram-4349, Bangladesh under grant number CUET DRE (CUET/DRE/2016-2017/PHY/005) for arranging the financial support for this work. We are thankful for the laboratory support of the Materials Science Division, Atomic Energy Center, Dhaka-1000, Bangladesh.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The authors are grateful to the Directorate of Research and Extension, Chittagong University of Engineering and Technology, Chattogram-4349, Bangladesh under CUET DRE [grant number CUET/DRE/2016-2017/PHY/005] for arranging the financial support for this work.