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Field-dependent anisotropy change in a supramolecular Mn(II)- [3 x 3] grid
O Waldmann1, L Zhao, L K Thompson
1Physikalisches Institut III, Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany. waldmann@physik.uni-erlangen.de
Physical Review Letters
|February 28, 2002
Abstract:
The magnetic anisotropy of a novel Mn(II)- [3x3] grid complex was investigated by means of high-field torque magnetometry. Torque vs field curves at low temperatures demonstrates a ground state with S>0 and exhibits a torque step due to a field-induced level crossing at B(*) approximately 7.5 T, accompanied by an abrupt change of magnetic anisotropy from easy-axis to hard-axis types. These observations are discussed in terms of a spin Hamiltonian formalism.