Breaking the ring: 53Cr-NMR on the Cr8Cd molecular nanomagnet.

摘要: An accurate experimental characterization of finite antiferromagnetic (AF) spin chains is crucial for controlling and manipulating their magnetic properties quantum states potential applications in spintronics or computation. In particular, AF are expected to show a different behaviour depending on length topology. Molecular rings able combine the quantum-magnetic with very remarkable tunability topological geometrical properties. this work we measure 53Cr-NMR spectra Cr8Cd ring study local densities Cr sites. can fact be considered model system open chain an even number spins. The NMR resonant frequencies good agreement theoretical densities, by assuming core polarization field A C = -12.7 T μ B-1. Moreover, these results confirm theoretically predicted non-collinear arrangement along ring, which typical even-open chain.