The pressure-dependence of the zero-field splitting of the S=10 ground state of the single-molecule magnet Mn12-acetate was studied by inelastic neutron scattering (INS) at hydrostatic pressures up to 12 kbar (see picture). The anisotropy increases with increasing pressure, and a pressure-dependent minority species of Mn12-acetate was observed. The increased anisotropy arises from increases in the single-ion anisotropy of the Mn3+ building blocks.
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Sieber et al. (2005) studied this question.
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