Wide bandgap oxide semiconductors with controllable sizes are an interesting class of nanomaterials due to their applications in spintronic and magneto-optical devices. In recent times, tin dioxide (SnO₂) an important class of n-type wide-band gap semiconductor in the nanoscale regime, has drawn considerable research interest owing to high optical transparency, high chemical/thermal stability and controllable optical and magnetic properties. Although bulk SnO₂ is diamagnetic due to lack of unpaired electrons, SnO₂ nanostructures with different morphology rope the formation of inherent defects and contribute defects induced ferromagnetism. Besides morphology-dependent magnetic properties, transition metal doping into the nanoscale SnO₂ crystal lattice endows tuneable magnetic properties. Here, we outline the synthesis strategies of SnO₂ based nanostructures with different morphology, including quantum dot, nanowire, nanotube, nanosheet, 3D-hierarchal flower-like structure and thin film. In addition to the pristine SnO₂ nanostructures, size, morphological and doping repercussions on the magnetic properties of single and double transition metal (TM)-doped SnO₂ nanostructures are also reviewed. Density functional theory (DFT) investigation of pristine and TM-doped SnO₂ systems is reviewed and the correlations between certain experimental results are explored. Finally, an outlook and challenges in understanding the basis of origin and control of ferromagnetism in SnO₂-based nanostructures are conferred.

具有可控尺寸的宽带隙氧化物半导体是一类有趣的纳米材料，因为它们在自旋电子和磁光器件中的应用。近年来，二氧化锡（SnO ₂）是一类重要的纳米级n型宽禁带半导体，由于其高光学透明性、高化学/热稳定性和可控的光学和磁性而引起了广泛的研究兴趣。尽管由于缺乏不成对电子，块状SnO _{2是抗磁性的，但具有不同形态的SnO 2}纳米结构会形成固有缺陷并有助于缺陷诱导铁磁性。除了与形态相关的磁性外，过渡金属掺杂到纳米级 SnO _2中晶格赋予了可调谐的磁性。在这里，我们概述了具有不同形态的SnO ₂纳米结构的合成策略，包括量子点、纳米线、纳米管、纳米片、3D-分层花状结构和薄膜。除了原始的 SnO ₂纳米结构外，还回顾了尺寸、形态和掺杂对单和双过渡金属 (TM) 掺杂的 SnO ₂纳米结构的磁性的影响。_{回顾了原始和 TM 掺杂 SnO 2}系统的密度泛函理论 (DFT) 研究，并探讨了某些实验结果之间的相关性。最后，了解 SnO 中铁磁性的起源和控制基础的前景和挑战赋予了基于_{2的纳米结构。}