Low-energy spin excitations in the molecular magnetic cluster V15

Abstract

We report an Inelastic Neutron Scattering (INS) study of the fully deuterated molecular compound K6[V15As6O42].9(D2O) (V15). Due to geometrical frustration, the essential physics at low temperatures of the V15 cluster containing 15 coupled V4+ (S=1/2) is determined by three weakly coupled spin-1/2 on a triangle. The INS spectra at low-energy allow us to directly determine the effective exchange coupling J0 = 0.211 meV within the triangle and the gap 2 Δ= 0.035(2)meV between the two spin-1/2 doublets of the ground state. Results are discussed in terms of deviations from trigonal symmetry and Dzyaloshinskii-Moriya (DM) interactions.

8 pages, 4 figures. to appear in Europhysics Letters

References in corpus (5)

• Butterfly hysteresis loop and dissipative spin reversal in the S=1/2, V15 molecular complex
• Low energy magnetic excitations of the Mn_{12}-acetate spin cluster observed by neutron scattering
• Non-adiabatic Landau-Zener transitions in low spin molecular magnet V15
• Mechanisms of decoherence in weakly anisotropic molecular magnets
• Continuous families of isospectral Heisenberg spin systems and the limits of inference from measurements

Cited by in corpus (14)

• Magnetic Cluster Excitations
• Adiabatic Landau-Zener-Stückelberg transition with or without dissipation in low spin molecular system V15
• Neutron Scattering and Magnetic Observables for S = 1/2 Molecular Magnets
• Exchange Interactions and High-Energy Spin States in Mn_12-acetate
• Mechanism of Ground State Selection in the Frustrated Molecular Spin Cluster V15
• Resonant photon absorption in the low spin molecule V15
• Magnetic Anisotropy in the Molecular Complex V15
• Magnetocaloric properties of V6 molecular magnet
• Magnetization and spin dynamics of the spin S=1/2 hourglass nanomagnet Cu5(OH)2(NIPA)4*10H2O
• Inelastic neutron scattering and frequency domain magnetic resonance studies of S=4 and S=12 Mn${}_6$ single-molecule magnets
• Unravelling the Spin Dynamics of Molecular Nanomagnets with Four-Dimensional Inelastic Neutron Scattering
• Generalization of polarized spin excitations for asymmetric dimeric systems
• Evolution of the thermodynamic properties and inelastic neutron scattering intensities for spin-1/2 antiferromagnetic quantum rings
• Formation of collective spins in frustrated clusters