| Attributs | Valeurs |
|---|
| type
| |
| Is Part Of
| |
| Subject
| |
| Title
| - Low-energy spin excitations in the molecular magnetic cluster $\chem V_{15}$
|
| Date
| |
| has manifestation of work
| |
| related by
| |
| Author
| |
| Abstract
| - We report an Inelastic Neutron Scattering (INS) study of the fully deuterated molecular compound $\chem{K_{6}[V^{IV}_{15}As_{6}O_{42}]}$ $ \cdot$ $\chem{9D_{2}O}$ ( $\chem{V_{15}}$). Due to geometrical frustration, the essential physics at low temperatures of the $\chem V_{15}$ cluster containing 15 coupled $\chem{V^{4+}}$ ( 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 $J_{0} = 0.211(2)$ meV within the triangle and the gap $2 \Delta = 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.
|
| article type
| |
| publisher identifier
| |
| Date Copyrighted
| |
| Rights
| |
| Rights Holder
| |
| is part of this journal
| |
| is primary topic
of | |
