The effective role of dilute Co on SnO2 nanoparticles: Structural, optical and magnetic characterization properties for spintronics

• Published in: Sensors and actuators. A. Physical. 2021-11, Vol.331, p.112984, Article 112984
• Main Authors: Afify, N., Abbady, Gh, Hamad, D., Abdelbaki, R.F., Yousef, El Sayed, Shaaban, E.R., N. Abd-el Salam, Mohamed
• Format: Article
• Language: English
• Subjects: Antireflection coatings; Chemical synthesis; Co-precipitation method; Cobalt; Crystallites; Energy gap; Hysteresis loop; Hysteresis loops; Magnetic measurement; Magnetic properties; Magnetism; Magnetometers; Measurement; Nanoparticles; Optical characterization; Optical properties; Optoelectronic devices; Precipitation; Sn1−xCoxO2 nanoparticles; Spintronics; Structural analysis; Structural parameters; Tin dioxide
• ISSN: 0924-4247; 1873-3069
• DOI: 10.1016/j.sna.2021.112984

M-H hysteresis curves of Sn1−xCoxO2 (with 0 ≤ x ≤ 0.10) nanoparticles. [Display omitted] •Sn1–xCoxO2 nanoparticles were prepared using ball milling.•The structural and optical properties of Sn1–xCoxO2 nanoparticles were studied.•The magnetic properties of Sn1–xCoxO2 nanoparticles were investigated as well.•Co doped SnO2 could be used in spintronics. Nano-particles of Sn1−xCoxO2 (0 ≤ x ≤ 0.10) were synthesized successfully using co-precipitation method. Utilizing X-ray diffraction, the energy dispersion of the X-ray (EDX), transmission electron microscopy (TEM) and UV- double-beam spectrophotometer, the influence of [Co]/[Sn] on the properties of nano-particles was examined. The influences of different Co concentrations are also stated on the optical and magnetic characterization of the nano-particles. XRD analysis shows that the Sn1−xCoxO2 nano-particles have a tetragonal polycrystalline structure. Additionally, the crystallite size, D is reduced while the micro-strain, (e) increases with enhancement of the incorporation of Co in SnO2 lattice. The formation of high density defect states and the new phases of Co2+ and Sn4+ were accountable for the decrease of the energy optical bandgap Egopt with Co-doping. In addition, the variation values of bandgap Egopt and magnetic measurements of SnO2 nano-particles doped Co% plays a major role for selective coatings of optoelectronics; use as antireflective coating materials, and fabrication of optoelectronic devices. The measurements of magnetization using vibrating sample magnetometer illustrated a hysteresis loop in Co-doped SnO2 nano-particles.