Quantum tunneling of two coupled single-molecular magnets

Details Quantum tunneling of two coupled single-molecular magnets Quantum tunneling of two coupled single-molecular magnets

2002-11-30

arxiv.org/abs/cond-mat/0212002v1

Phys. Rev. B 68, 104407 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages including 3 figure and 1 table

Scientific paper

10.1103/PhysRevB.68.104407

Two single-molecule magnets are coupled antiferromagnetically to form a supramolecule dimer. We study the coupling effect and tunneling process by means of the numerical exact diagonalization method, and apply them to the recently synthesized supramoleculer dimer [Mn4]2 The model parameters are calculated for the dimer based on the tunneling process. The absence of tunneling at zero field and sweeping rate effect on the step height in the hysterisis loops are understood very well in this theory.

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