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Magnetic enhancement and magnetic signal tunability of (Mn, Co) co-doped SnO2 dilute magnetic semiconductor nanoparticles.
- Source :
-
Journal of Magnetism & Magnetic Materials . Feb2019, Vol. 471, p370-380. 11p. - Publication Year :
- 2019
-
Abstract
- Highlights • (Mn, Co) co-doped SnO 2 nanoparticles are fabricated by the CPACP technique. • Enhanced magnetization is fulfilled in the co-doped system. • Transition from ferromagnetism to paramagnetism is observed in the co-doped system. • The excessively Mn doping leads to a diamagnetic behavior. Abstract Co and Mn-Co co-doped SnO 2 nanoparticles have been successfully synthesized using a simple technique called as citrate precursor assisted co-precipitation (CPACP). Structural and compositional analyses by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), Energy Dispersive X-Ray Fluorescence Spectrometer (EDX), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy confirmed that Co and Mn ions were incorporated into the SnO 2 host lattice without changing the inherent rutile structure. The average crystallite size of the prepared samples were estimated to be in the range of 8–12 nm. In a single Co2+-doped SnO 2 sample, the magnetization was observed to increase as the Co2+ ions concentration increased. The transition metal Mn can adjust the magnetic signal of the Co2+-doped SnO 2 sample, which is subject to the concentration of Mn dopant. Adding a proper amount of Mn to the Co2+-doped SnO 2 sample enhanced the magnetization. As the Mn2+ ions concentration increases, the magnetic properties of the (Mn, Co) co-doped SnO 2 nanoparticles gradually shift from ferromagnetic behavior to superparamagnetism. However, the sample Sn 0.83 Mn 0.12 Co 0.05 O 2 exhibits diamagnetic behavior when the concentration of Mn2+ ions is doped excessively. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03048853
- Volume :
- 471
- Database :
- Academic Search Index
- Journal :
- Journal of Magnetism & Magnetic Materials
- Publication Type :
- Academic Journal
- Accession number :
- 132919301
- Full Text :
- https://doi.org/10.1016/j.jmmm.2018.09.106