Large transverse field tunnel splittings in the Fe8 spin Hamiltonian
Abstract
The spin Hamiltonian that describes the molecular magnet Fe8 has biaxial symmetry with mutually perpendicular easy, medium, and hard magnetic axes. Previous calculations of the ground state tunnel splittings in the presence of a magnetic field along the hard axis are extended, and the meaning of the previously discovered oscillation of this splitting is further clarified.
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