Weakly Interacting Molecular Spins in On‐Surface Synthesized Nanoclusters on a Graphene Oxide Nanosheet

With an average diameter of ≈2 nm, on-surface synthesized amino-ferrocene nanoclusters are chemisorbed onto a graphene oxide nanosheet, where their Fe ions in S = 5/2 high-spin state. In this two-dimensional (2D) nanomaterial, the molecular spins given nanocluster weakly magnetic dipole interacting. It generates spin correlations and slow dynamics accessible by susceptibility Mössbauer spectroscopy at temperature anisotropy is negligible. Magnetic simulations show that minimizing energies produces spatially entangled structures orientations under thermal fluctuations T ≲ 15 K behave like liquid. The competition between formation destruction dynamics. ability to create emergent functionalities from dense stacks interacting molecules 2 nm space paves way for new designs ultra-compact building block functional component 2D spintronic neuromorphic devices.