S-mixing and quantum tunneling of the magnetization in molecular nanomagnets

Abstract

The role of $S$-mixing in the quantum tunneling of the magnetization in nanomagnets has been investigated. We show that the effect on the tunneling frequency is huge and that the discrepancy (more than 3 orders of magnitude in the tunneling frequency) between spectroscopic and relaxation measurements in Fe${}_8$ can be resolved if $S$-mixing is taken into account.

REVTEX, 10 pages, 3 jpg figures, to appear in PRL

References in corpus (4)

• Low-Temperature Quantum Relaxation in a System of Magnetic Nanomolecules
• Detailed single crystal EPR lineshape measurements for the single molecule magnets Fe8Br and Mn12-ac
• Incoherent Zener tunneling and its application to molecular magnets
• Macroscopic evidence of quantum coherent oscillations of the total spin in the Mn-[3x3] molecular nanomagnet

Cited by in corpus (18)

• Magnetic Cluster Excitations
• Pair-wise decoherence in coupled spin qubit networks
• Spin dynamics of heterometallic Cr7M wheels (M = Mn, Zn, Ni) probed by inelastic neutron scattering
• NMR as a probe of the relaxation of the magnetization in magnetic molecules
• Topology and spin dynamics in magnetic molecules
• Many-spin effects in inelastic neutron scattering and electron paramagnetic resonance of molecular nanomagnets
• A perturbative approach to J mixing in f-electron systems: Application to actinide dioxides
• Single-ion and exchange anisotropy effects and multiferroic behavior in high-symmetry tetramer single molecule magnets
• Theory of high-symmetry tetramer single molecule magnets
• Origin and spectroscopic determination of trigonal anisotropy in a heteronuclear single-molecule magnet
• Direct observation of mixing of spin-multiplets in an antiferromagnetic molecular nanomagnet by electron paramagnetic resonance
• Inelastic neutron scattering and frequency domain magnetic resonance studies of S=4 and S=12 Mn${}_6$ single-molecule magnets
• Dynamics and thermalization of the nuclear spin bath in the single-molecule magnet Mn12-ac: test for the theory of spin tunneling
• Self-organized patterns of macroscopic quantum tunneling in molecular magnets
• Spin anisotropy effects in dimer single molecule magnets
• Quantum deflagration and supersonic fronts of tunneling in molecular magnets
• Quantum interference oscillations of the superparamagnetic blocking in an Fe8 molecular nanomagnet
• Determination of spin Hamiltonian in the Ni${}_4$ magnetic molecule