Among nanoalloys, Co–Pt type (CoPt or FePt) supported nanostructures are very interesting systems due to the direct link between atom arrangement and magnetic behavior. In addition, these alloys become model systems in the field of nanoalloys, due to the diversity of atom arrangements either present in the bulk state or specific to the nanoscale (chemically ordered L1₀, L1₂, or disordered fcc structures, core–shell, five-fold structures – icosahedral or decahedral, etc.). The synergy between experimental and modeling efforts has allowed the emergence of an overview of the structural, morphological and chemical behaviors of CoPt-based supported nanoparticles in terms of phase diagrams (temperature, composition, size effect), kinetic behavior (growth, annealing, ordering), and also in terms of environment effects (substrate, capping, matrix, gas) and of magnetic properties. All aspects of this complexity are reviewed: synthesis strategies (physical deposition, cluster beam deposition and wet chemical methods), magnetic behavior (atomic magnetic moment, magnetic anisotropy energy), structural transitions (non-crystalline/crystalline structures, order/disorder, surface/interface segregation), etc. In this field, the investigation techniques, such as electron microscopy and X-ray scattering or absorption techniques, are generally used at their ultimate limit due the small size of the studied objects. Finally, several aspects of the annealing process, which is a key phenomenon to achieve the chemical order, have been discussed in both thermodynamic and kinetic points of view (size effect, critical temperature, annealing time, twinning, coalescence, etc.).

在纳米合金中，由于原子排列和磁行为之间的直接联系，Co-Pt型（CoPt或FePt）负载的纳米结构是非常有趣的系统。另外，由于原子结构的多样性（以本体状态存在或特定于纳米级，这些合金成为纳米合金领域的模型系统）（化学顺序为L1 ₀，L1 ₂，或无序的fcc结构，核-壳，五重结构-二十面体或十面体等）。实验和建模工作之间的协同作用使得出现了基于相图（温度，组成，尺寸效应），动力学行为（生长，退火，有序化）的基于CoPt的负载型纳米颗粒的结构，形态和化学行为的概述。 ），以及环境影响（基材，封盖，基体，气体）和磁性。审查了这种复杂性的所有方面：合成策略（物理沉积，簇束沉积和湿化学方法），磁行为（原子磁矩，磁各向异性能），结构转变（非晶/晶体结构，有序/无序，表面） / interface segregation）等。在此字段中，由于研究对象的体积小，通常以其最终极限使用诸如电子显微镜和X射线散射或吸收技术之类的研究技术。最后，从热力学和动力学的角度（大小效应，临界温度，退火时间，孪晶，聚结等）讨论了退火工艺的几个方面，这是实现化学有序​​化的关键现象。