Bushra Parveen | Lahore Garrison University Pakistan (original) (raw)
Papers by Bushra Parveen
Journal of Magnetism and Magnetic Materials, 2021
The multifunctional and tunable properties of semiconductors can be achieved by intentional dopin... more The multifunctional and tunable properties of semiconductors can be achieved by intentional doping of the host lattice with appropriate impurities. In this study, the structure, ferromagnetism and dielectric response of Zr doped SnO2 nano-crystallites, fabricated using co-precipitation technique, have been investigated. X-ray diffraction studies confirm the successful fabrication of Zr doped SnO2 along with one minor peak belonging to SnO. The measured surface morphology shows non-uniform and denser grain distribution. The optical studies show decaying band gaps. The impedance analysis reveals grains and grain boundaries conduction exhibiting different relaxation times. The maximum grains capacitance has been observed in 4% of Zr content. Furthermore, above room temperature ferromagnetic-like behavior is observed, which is quite attractive for magnetic device applications. Hence, the studied diluted magnetic semiconductors are appealing not only for fundamental physics but also for ...
Journal of Applied Research and Technology, 2017
We report undoped and Ni-doped TiO 2 (x Ni = 0.00, 0.50, 1.00, 1.50, 2.00 and 2.50 wt.%) thin fil... more We report undoped and Ni-doped TiO 2 (x Ni = 0.00, 0.50, 1.00, 1.50, 2.00 and 2.50 wt.%) thin films fabricated on glass substrates by using a combination of solid-state reaction and dip coating techniques. The structural properties are observed by X-ray diffraction (XRD), which have depicted that annealing at 650 • C results in rutile Ni-doped TiO 2 as a major phase along with a minor anatase phase. The surface morphology of the deposited thin films, as measured by scanning electron microscopy (SEM), indicates granular spherical shaped nanostructures. Room-temperature ferromagnetism (RTFM) has been illustrated by all the grown thin films, as elucidated by vibrating sample magnetometer (VSM). Although Ni content has no pronounced effect on the crystallinity that indicates a substitutional replacement of Ni in TiO 2 lattice, however, Ni content is observed to influence the ferromagnetic behavior. Therefore, the present study signifies the potential spintronic applications of Ni-doped TiO 2 diluted magnetic semiconductors, fabricated by a low-cost method, as it exhibits RTFM with nanograins at the surface.
Journal of Magnetism and Magnetic Materials, 2021
The multifunctional and tunable properties of semiconductors can be achieved by intentional dopin... more The multifunctional and tunable properties of semiconductors can be achieved by intentional doping of the host lattice with appropriate impurities. In this study, the structure, ferromagnetism and dielectric response of Zr doped SnO2 nano-crystallites, fabricated using co-precipitation technique, have been investigated. X-ray diffraction studies confirm the successful fabrication of Zr doped SnO2 along with one minor peak belonging to SnO. The measured surface morphology shows non-uniform and denser grain distribution. The optical studies show decaying band gaps. The impedance analysis reveals grains and grain boundaries conduction exhibiting different relaxation times. The maximum grains capacitance has been observed in 4% of Zr content. Furthermore, above room temperature ferromagnetic-like behavior is observed, which is quite attractive for magnetic device applications. Hence, the studied diluted magnetic semiconductors are appealing not only for fundamental physics but also for ...
Journal of Applied Research and Technology, 2017
We report undoped and Ni-doped TiO 2 (x Ni = 0.00, 0.50, 1.00, 1.50, 2.00 and 2.50 wt.%) thin fil... more We report undoped and Ni-doped TiO 2 (x Ni = 0.00, 0.50, 1.00, 1.50, 2.00 and 2.50 wt.%) thin films fabricated on glass substrates by using a combination of solid-state reaction and dip coating techniques. The structural properties are observed by X-ray diffraction (XRD), which have depicted that annealing at 650 • C results in rutile Ni-doped TiO 2 as a major phase along with a minor anatase phase. The surface morphology of the deposited thin films, as measured by scanning electron microscopy (SEM), indicates granular spherical shaped nanostructures. Room-temperature ferromagnetism (RTFM) has been illustrated by all the grown thin films, as elucidated by vibrating sample magnetometer (VSM). Although Ni content has no pronounced effect on the crystallinity that indicates a substitutional replacement of Ni in TiO 2 lattice, however, Ni content is observed to influence the ferromagnetic behavior. Therefore, the present study signifies the potential spintronic applications of Ni-doped TiO 2 diluted magnetic semiconductors, fabricated by a low-cost method, as it exhibits RTFM with nanograins at the surface.