Institute of Applied Physics and Interdisciplinary Nanoscience Center Hamburg, University of Hamburg, D-20355 Hamburg, Germany.
Peter Grünberg Institut (PGI-1) and Institute of Advanced Simulation (IAS-1), Forschungszentrum Jülich and JARA, 52428 Jülich, Germany.
Nat Nanotechnol. 2014 Dec;9(12):1018-23. doi: 10.1038/nnano.2014.235. Epub 2014 Oct 19.
The design of nanoscale organic-metal hybrids with tunable magnetic properties as well as the realization of controlled magnetic coupling between them open gateways for novel molecular spintronic devices. Progress in this direction requires a combination of a clever choice of organic and thin-film materials, advanced magnetic characterization techniques with a spatial resolution down to the atomic length scale, and a thorough understanding of magnetic properties based on first-principles calculations. Here, we make use of carbon-based systems of various nanoscale size, such as single coronene molecules and islands of graphene, deposited on a skyrmion lattice of a single atomic layer of iron on an iridium substrate, in order to tune the magnetic characteristics (for example, magnetic moments, magnetic anisotropies and coercive field strengths) of the organic-metal hybrids. Moreover, we demonstrate long-range magnetic coupling between individual organic-metal hybrids via the chiral magnetic skyrmion lattice, thereby offering viable routes towards spin information transmission between magnetically stable states in nanoscale dimensions.
设计具有可调磁性能的纳米级有机金属杂化材料，以及实现它们之间的可控磁耦合，为新型分子自旋电子器件开辟了新的途径。这一方向的进展需要巧妙地选择有机和薄膜材料，结合具有原子长度尺度空间分辨率的先进磁性表征技术，以及基于第一性原理计算的对磁性性质的深入理解。在这里，我们利用各种纳米级尺寸的碳基系统，如单个蒄分子和石墨烯岛，沉积在铱衬底上的单层铁原子的斯格明子晶格上，以调节有机-金属杂化材料的磁性特征（例如，磁矩、磁各向异性和矫顽场强度）。此外，我们通过手性磁斯格明子晶格证明了单个有机-金属杂化之间的长程磁耦合，从而为在纳米尺度上在稳定磁态之间传输自旋信息提供了可行的途径。
