A criterion for the anisotropy barrier in single-molecule magnets.
A criterion for the height of the anisotropy barrier Delta=|D|S2 in single-molecule magnets, and therefore the blocking temperature TB proportional to Delta, is presented. In particular, it is found that the anisotropy barrier does not increase with S as S2 but as S0. Consequences concerning the strategies to enhance Delta or TB, respectively, are discussed.
Waldmann
Oliver
O
Department of Chemistry and Biochemistry, University of Bern, CH-3012 Bern, Switzerland. oliver.waldmann@physik.uni-freiburg.de