Division of Materials Physics, Department of Physics, University of Helsinki, PO Box 43, FI-00014 Helsinki, Finland.
ACS Nano. 2013 Aug 27;7(8):6691-9. doi: 10.1021/nn401914b. Epub 2013 Jul 12.
While bulk gold is well known to be diamagnetic, there is a growing body of convincing experimental and theoretical work indicating that nanostructured gold can be imparted with unconventional magnetic properties. Bridging the current gap in experimental study of magnetism in bare gold nanomaterials, we report here on magnetism in gold nanocrystalline films produced by cluster deposition in the aggregate form that can be considered as a crossover state between a nanocluster and a continuous film. We demonstrate ferromagnetic-like hysteretic magnetization with temperature dependence indicative of spin-glass-like behavior and find this to be consistent with theoretical predictions, available in the literature, based on first-principles calculations.
虽然块状金的抗磁性众所周知，但越来越多令人信服的实验和理论工作表明，纳米结构的金可以具有非传统的磁性。为了弥合裸金纳米材料中磁性实验研究的当前差距，我们在这里报告了通过团簇沉积在聚合形式下生产的金纳米晶薄膜中的磁性，这种形式可以被认为是纳米团簇和连续薄膜之间的交叉状态。我们证明了具有类似于铁磁的磁滞磁化，其温度依赖性表明具有类似自旋玻璃的行为，并且发现这与文献中基于第一性原理计算的理论预测一致。
