Inelastic Neutron Scattering Study of Mn_12-Acetate

Abstract

We report zero-field inelastic neutron scattering experiments on a deuterated powder sample of Mn12-Acetate consisting of a large number of nominally identical spin-10 magnetic clusters. Our resolution enables us to see a series of peaks corresponding to transitions between the anisotropy levels within the spin-10 manifold. A fit to the spin Hamiltonian yields an anisotropy constant D=0.54 K and a fourth-order diagonal anisotropy coefficient A = 1.2x10^-3 K. Performed in the absence of a magnetic field, our experiments do not involve the g-values as fitting parameters, thereby yielding particularly reliable values of D and A.

Submission to Conference on Magnetism and Magnetic Materials. Will appear in proceedings of the conference published in JAP in April 1999

References in corpus (2)

• High frequency EPR spectra of a molecular nanomagnet provide a key to understand Quantum Tunneling of the Magnetization
• Thermally Activated Resonant Magnetization Tunneling in Molecular Magnets: Mn_12Ac and others

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• Spin Tunneling and Phonon-assisted Relaxation in Mn12-acetate
• Crossover between Thermally Assisted and Pure Quantum Tunneling in Molecular Magnet Mn12-Acetate
• Exchange Interactions and High-Energy Spin States in Mn_12-acetate
• Magnetic excitations in {Mo72Fe30}
• Low temperature magnetic hysteresis in Mn${}_{12}$ acetate single crystals
• Magnetic Anisotropy in the Molecular Complex V15
• 55Mn NMR in Mn12 acetate: Hyperfine interaction and magnetic relaxation of cluster
• Linewidth of single photon transitions in Mn${}_{12}$-acetate
• Transverse Magnetic Anisotropy in Mn12-acetate: Direct Determination by Inelastic Neutron Scattering
• Spin dynamics of Mn12-acetate in the thermally-activated tunneling regime: ac-susceptibility and magnetization relaxation
• Abrupt Transition between Thermally-Activated Relaxation and Quantum Tunneling in a Molecular Magnet
• Crystal defects and spin tunneling in single crystals of Mn12 clusters
• On Ground State Tunneling in Mn${}_{12}$-Acetate
• Level crossings and zero-field splitting in the \{Cr${}_8$\}-cubane spin-cluster by inelastic neutron scattering and magnetization studies
• More Evidence for a Distribution of Tunnel Splittings in Mn${}_{12}$-acetate