| Emergence of Nano-structured Zn0.1Co1-xLaxS Diluted Ferromagnetic Semiconductor Quantum Dots: Toward Efficient Spintronic Applications |
| Paper ID : 1058-ISCH |
| Authors |
| Muhammad Ibrahim Muhammad Muhammad Muhammad Amer * |
| Abstract |
| In recent years, nanostructured materials have revolutionized various scientific and technological domains by offering novel materials with exceptional properties at the nanoscale. Among these nanostructured materials, semiconductor quantum dots (QDs) have attracted substantial attention due to their unique size-dependent properties, including quantum confinement effects. Furthermore, the incorporation of magnetic elements into semiconductor QDs has given rise to a new class of materials known as diluted magnetic semiconductor quantum dots (DMS-QDs), which have the potential to revolutionize fields such as spintronics, and quantum computing. The investigation delves into novel strategies to engineer the size, shape, and surface of these QDs, aiming for optimal parameters to enhance the spin-dependent transport and magnetic functionalities, critical for spintronic device applications. Nano-sized (Co, La) co-doped ZnS DMS-QDs were presented and discussed, all synthesized through a colloidal co-precipitation method. The acquired product was free of any traces, both in its bulk form (XRD) and on the surface (XPS). The successful integration of dopants into the ZnS host lattice, the extent of the quantum regime, the divalent/trivalent oxidation state, and the existence of sulphur vacancies were validated through XPS, XRD, and Raman analysis. The HR-TEM and EDX analysis revealed that the doped QDs exhibit a consistent spherical shape with a mean particle size of 5 ± 0.5 nm. Using the Vibrating sample magnetometer System (VSM), the QDs have exhibited ferromagnetic ordering (FM) at room temperature, which could be ascribed to the presence of sulphur vacancies, as supported by XPS and PL studies. |
| Keywords |
| Diluted Magnetic Semiconductors - Quantum dots - PL analysis - Optoelectronic and spintronic applications |
| Status: Abstract Accepted (Poster Presentation) |