Local Magnetic Properties of a Monolayer of Mn12 Single Molecule Magnets
Z. Salman, K. H. Chow, R. I. Miller, A. Morello, T. J. Parolin, M. D., Hossain, T. A. Keeler, C. D. P. Levy, W. A. MacFarlane, G. D. Morris, H., Saadaoui, D. Wang, R. Sessoli, G. G. Condorelli, and R. F. Kiefl
TL;DR
This study investigates the local magnetic properties of a monolayer of Mn12 single molecule magnets on silicon using depth-controlled beta-detected NMR, revealing unique magnetic behaviors distinct from bulk Mn12.
Contribution
It introduces a novel application of depth-controlled beta-detected NMR to analyze the magnetic properties of a monolayer of Mn12 molecules on a silicon substrate.
Findings
Resonance linewidth varies with implantation depth due to dipolar fields.
Magnetic properties in monolayer differ from bulk Mn12.
Temperature affects the magnetic behavior of the monolayer.
Abstract
The magnetic properties of a monolayer of Mn12 single molecule magnets grafted onto a Si substrate have been investigated using depth-controlled -detected nuclear magnetic resonance. A low energy beam of spin polarized radioactive 8Li was used to probe the local static magnetic field distribution near the Mn12 monolayer in the Si substrate. The resonance linewidth varies strongly as a function of implantation depth as a result of the magnetic dipolar fields generated by the Mn12 electronic magnetic moments. The temperature dependence of the linewidth indicates that the magnetic properties of the Mn12 moments in this low dimensional configuration differ from bulk Mn12.
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