Sm-incorporated CoCr2O4 nanoparticles: tunable structural, optical, and magnetic properties

IF 2.8 4区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Sipun Mohanty, Mritunjoy Prasad Ghosh, Samrat Mukherjee
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引用次数: 0

Abstract

In order to solve environmental challenges and fulfill the growing demand for renewable energy sources, researchers worldwide are looking for effective nanomaterials to cleanse wastewater and replace fossil fuels. In this study, doping of Sm3+ ions in nanocrystalline cobalt chromites and their effects on the structural, optical, and magnetic characteristics have been investigated thoroughly. Four Sm-doped nanosized cobalt chromites with a generic formula of CoSmxCr2-xO4 (x = 0.0, 0.03, 0.06, and 0.09) were prepared using the conventional wet co-precipitation technique. Powder x-ray diffractograms were obtained to confirm the cubic spinel crystal structure formation. Average crystallite sizes were observed to reduce with increasing Sm percentage in CoCr2O4 nanoparticles. The mean particle sizes derived from HRTEM images also followed a similar trend. Indirect optical band gaps increased with increasing Sm content in the host nanosized chromites. Vibrational Raman spectra recorded at room temperature confirmed the lowering of crystal symmetry for higher Sm content chromite samples. The Néel temperature of doped chromite nanoparticles was noticed to reduce with increasing Sm concentration. A gradual increase of effective anisotropy constant at 5 K with increasing Sm dopants confirmed the presence of various surface effects in the doped chromite samples. The doped samples have various applications, including sensors, detectors, photocatalysis, solar cells, and hyperthermia.

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来源期刊
Journal of Materials Science: Materials in Electronics
Journal of Materials Science: Materials in Electronics 工程技术-材料科学:综合
CiteScore
5.00
自引率
7.10%
发文量
1931
审稿时长
2 months
期刊介绍: The Journal of Materials Science: Materials in Electronics is an established refereed companion to the Journal of Materials Science. It publishes papers on materials and their applications in modern electronics, covering the ground between fundamental science, such as semiconductor physics, and work concerned specifically with applications. It explores the growth and preparation of new materials, as well as their processing, fabrication, bonding and encapsulation, together with the reliability, failure analysis, quality assurance and characterization related to the whole range of applications in electronics. The Journal presents papers in newly developing fields such as low dimensional structures and devices, optoelectronics including III-V compounds, glasses and linear/non-linear crystal materials and lasers, high Tc superconductors, conducting polymers, thick film materials and new contact technologies, as well as the established electronics device and circuit materials.
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