Inelastic neutron scattering and frequency-domain magnetic resonance studies of S=4 and S=12 Mn6single-molecule magnets

O. Pieper, T. Guidi, S. Carretta, J. Van Slageren, F. El Hallak, B. Lake, Maria Paola Santini, G. Amoretti, Hannu Mutka, M. Koza, M. Russina, A. Schnegg, Constantinos J Milios, Euan K Brechin, A. Julià, J. Tejada

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Abstract

We investigate the magnetic properties of three Mn6 single-molecule magnets by means of inelastic neutron scattering and frequency domain magnetic resonance spectroscopy. The experimental data reveal that small structural distortions of the molecular geometry produce a significant effect on the energy-level diagram and therefore on the magnetic properties of the molecule. We show that the giant spin model completely fails to describe the spin-level structure of the ground spin multiplets. We analyze theoretically the spin Hamiltonian for the low-spin Mn6 molecule (S=4) and we show that the excited S multiplets play a key role in determining the effective energy barrier for the magnetization reversal, in analogy to what was previously found for the two high spin Mn6 (S=12) molecules.

Original languageEnglish
Article number174420
JournalPhysical Review B
Volume81
Issue number17
DOIs
Publication statusPublished - 21 May 2010
Externally publishedYes

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