Observation of Anisotropy-driven Quantum Dynamics of Single-Molecule Magnet Spins at 100mK

We will present the continuing results of the implementation of our novel experimental technique to allow pulse EPR studies (spin echo) of condensed samples of single-molecule magnets and single-atom magnets (non-diluted crystals) at temperatures at or below 100mK. The aim is to eliminate dephasing due to dipolar fluctuations by freezing the spin state of all molecules in the crystal in the ground state without the need of applying strong magnetic fields. We expect that these conditions would allow us to study the quantum dynamics of the spins as governed by the intrinsic molecular magnetic anisotropy, which should give rise to non-well defined Rabi oscillations of the spin state, including metastable precessional spin states.