High frequency EPR on dilute solutions of the single molecule magnet Ni${}_4$

Abstract

Dilute frozen solutions of the single molecule magnet Ni${}_4$ (S=4) have been studied using high frequency D-band (130 GHz) EPR. Despite the random orientation of the molecules, well defined EPR absorption peaks are observed, due to the strong variation of the splittings between the different spin-states on magnetic field. Temperature dependent studies above 4 K and comparison with simulations enable identification of the spin transitions and determination of the Hamiltonian parameters. The latter are found to be close to those of Ni${}_4$ single crystals. No echo was detected from Ni${}_4$ in pulsed experiments, which sets an upper bound of about 50 ns on the spin coherence time.

4 pages, 3 figures, accepted for publication in Journal of Applied Physics (52nd MMM conference proceedings)

References in corpus (2)

• Will spin-relaxation times in molecular magnets permit quantum information processing?
• Magnetization and EPR studies of the single molecule magnet Ni${}_4$ with integrated sensors

Cited by in corpus (3)

• Direct Observation of Quantum Coherence in Single-Molecule Magnets
• Coherent Manipulation and Decoherence of S=10 Single-Molecule Magnets
• Magnetization relaxation in the single molecule magnet Ni${}_4$ under continuous microwave irradiation