Physics of Single Molecule Magnets

These properties are most easily explained by example, and here we briefly survey the key points for the first discovered [Mni20i2 [Pg.303]

In summary, experiments show that Mui2 has an S = 10 ground state with D = —0.46 cm . The negative sign means that within the [Pg.304]

44 T Ms = -10 crosses with +9, -9 with +8, and so on. Given that the levels are at energy DM + Msgj H, it is easy to see that the separation between adjacent crossings is AH = D/g. [Pg.308]

This provides an additional pathway to relaxation. Imagine the magnetisation has been saturated at very low temperature and positive field [Pg.308]

This effect can in principle be measured by any technique that is sensitive to the magnetisation dynamics and in addition to the SQUID measurements above quantum tunnelling of magnetisation (QTM) has been observed for Mni2 by, for example, torque magnetometry, and Mn nuclear relaxation rates in and specific heat. [Pg.309]

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