Gerina Marianna, Sanna Angotzi Marco, Mameli Valentina, Mazur Michal, Rusta Nicoletta, Balica Elena, Hrubovcak Pavol, Cannas Carla, Honecker Dirk, Zákutná Dominika
Department of Inorganic Chemistry, Charles University, Hlavova 2030/8, 128 43 Prague 2, Czech Republic.
Department of Chemical and Geological Sciences, University of Cagliari, S.S. 554 Bivio per Sestu, 09042 8 Monserrato, CA, Italy.
ACS Appl Nano Mater. 2024 Nov 15;7(23):27210-27216. doi: 10.1021/acsanm.4c05231. eCollection 2024 Dec 13.
Designing well-defined magnetic nanomaterials is crucial for various applications, and it demands a comprehensive understanding of their magnetic properties at the microscopic level. In this study, we investigate the contributions to the total anisotropy of Mn/Co mixed spinel nanoparticles. By employing neutron measurements sensitive to the spatially resolved surface anisotropy with sub-Å space resolution, we reveal an additional contribution to the anisotropy constant arising from shape anisotropy and interparticle interactions. Our findings shed light on the intricate interplay among chemical composition, microstructure, morphology, and surface effects, providing valuable insights for the design of advanced magnetic nanomaterials for AC biomedical applications, such as cancer treatment by magnetic fluid hyperthermia.
设计明确的磁性纳米材料对于各种应用至关重要，这需要在微观层面全面了解其磁性。在本研究中，我们研究了Mn/Co混合尖晶石纳米颗粒对总各向异性的贡献。通过采用对具有亚埃空间分辨率的空间分辨表面各向异性敏感的中子测量，我们揭示了形状各向异性和颗粒间相互作用对各向异性常数的额外贡献。我们的研究结果揭示了化学成分、微观结构、形态和表面效应之间的复杂相互作用，为设计用于交流生物医学应用的先进磁性纳米材料提供了有价值的见解，例如通过磁流体热疗治疗癌症。
