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Nanomaterials 2016, 6(4), 73; doi:10.3390/nano6040073

Temperature-Dependent Magnetic Response of Antiferromagnetic Doping in Cobalt Ferrite Nanostructures

1
Centre for High Energy Physics, University of the Punjab, Lahore 54000, Pakistan
2
Nanomaterials Research group, Physics Division, Pakistan Institute of Nuclear Science and Technology, Nilore, Islamabad 45650, Pakistan
3
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
4
Centre for excellence in Solid State Physics, University of the Punjab, Lahore 54000, Pakistan
*
Author to whom correspondence should be addressed.
Academic Editor: Yurii Gun’ko
Received: 22 December 2015 / Revised: 7 March 2016 / Accepted: 11 March 2016 / Published: 18 April 2016
(This article belongs to the Special Issue Recent Advances in Nanomaterials’ Research: Selection from ICSSP'15)
View Full-Text   |   Download PDF [3421 KB, uploaded 18 April 2016]   |  

Abstract

In this work MnxCo1−xFe2O4 nanoparticles (NPs) were synthesized using a chemical co-precipitation method. Phase purity and structural analyses of synthesized NPs were performed by X-ray diffractometer (XRD). Transmission electron microscopy (TEM) reveals the presence of highly crystalline and narrowly-dispersed NPs with average diameter of 14 nm. The Fourier transform infrared (FTIR) spectrum was measured in the range of 400–4000 cm−1 which confirmed the formation of vibrational frequency bands associated with the entire spinel structure. Temperature-dependent magnetic properties in anti-ferromagnet (AFM) and ferromagnet (FM) structure were investigated with the aid of a physical property measurement system (PPMS). It was observed that magnetic interactions between the AFM (Mn) and FM (CoFe2O4) material arise below the Neel temperature of the dopant. Furthermore, hysteresis response was clearly pronounced for the enhancement in magnetic parameters by varying temperature towards absolute zero. It is shown that magnetic properties have been tuned as a function of temperature and an externally-applied field. View Full-Text
Keywords: co-precipitation; ferrites; zero field cooled (ZFC) and field cooled (FC) curves; magnetic anisotropy co-precipitation; ferrites; zero field cooled (ZFC) and field cooled (FC) curves; magnetic anisotropy
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MDPI and ACS Style

Nairan, A.; Khan, M.; Khan, U.; Iqbal, M.; Riaz, S.; Naseem, S. Temperature-Dependent Magnetic Response of Antiferromagnetic Doping in Cobalt Ferrite Nanostructures. Nanomaterials 2016, 6, 73.

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