# Mechanism of ground-state selection in the frustrated molecular spin cluster V15

@article{Chaboussant2004MechanismOG,
title={Mechanism of ground-state selection in the frustrated molecular spin cluster V15},
author={Gr{\'e}gory Chaboussant and Stefan T Ochsenbein and Andreas Sieber and Hans U. Guedel and Hannu Mutka and Andreas Mueller and Bernard Barbara},
journal={EPL},
year={2004},
volume={66},
pages={423-429}
}
• Published 29 January 2004
• Physics
• EPL
We report an inelastic neutron scattering (INS) study under a magnetic field on the frustrated molecular spin cluster V15. Several field-dependent transitions are observed and provide a comprehensive understanding of the low-energy quantum spin states. The energy gap 2Δ0 ≈ 27(3) μeV between the two lowest S = 1/2 Kramers doublets is unambiguously attributed to a symmetry lowering of the cluster. The INS data are mapped onto an S = 1/2 Antiferromagnetic Heisenberg triangle with scalene…
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## References

SHOWING 1-10 OF 30 REFERENCES

• Physics
• 2002
We report an Inelastic Neutron Scattering (INS) study of the fully deuterated molecular compound K6[V15IVAs6O42] · 9D2O (V15). Due to geometrical frustration, the essential physics at low
• Physics
Science
• 2002
The observation of magnetic superstructure in a magnetization plateau state of SrCu2(BO3)2, a frustrated quasi–two-dimensional quantum spin system, and the crystallization of itinerant triplets in the plateau phase within a large rhomboid unit cell shows oscillations of the spin polarization.
• Physics, Materials Science
Physical review letters
• 2001
The phase diagram of the doped system is studied by computing the static susceptibility and staggered magnetization using a stochastic series-expansion quantum Monte Carlo technique, which results in a phase of weak but long-ranged antiferromagnetic order.
• Physics
• 2003
The spin-$\frac{1}{2}$ molecular system ${\mathrm{V}}_{15}$ shows no barrier against spin reversal. This makes possible direct phonon activation between the two levels. By tuning the field sweeping
• Chemistry
• 1975
The magnetic susceptibility of Cu3(C6H5N2O)3(OH)SO4 · 10.5 H2O crystals was measured in the temperature interval 4.2–11 K and magnetic field range 0–50 kOe. The theoretical analysis of the effects of
• Physics
• 2003
We report the reflectance and optical conductivity of solid K 6 [V 1 5 As 6 O 4 2 (H 2 O)].8H 2 O over a wide energy range in order to investigate the charge degrees of freedom in this molecule-based
• Physics, Chemistry
• 2003
A novel type of high-frequency magnetic resonance spectroscopy was used to investigate magnetic excitations of the molecular magnetic cluster V15 in the frequency range from 1.5 cm−1 to 10 cm−1, at
• Physics
Physical review letters
• 2000
Time resolved magnetization measurements have been performed on a spin 1/2 molecular complex, so-called V15, and spin-phonon coupling leads to long relaxation times and to a particular "butterfly" hysteresis loop.
• Physics
• 2002
The low-temperature behavior of the magnetic susceptibility of the V15 low-spin cluster in ultrastrong magnetic fields of up to 550 T was studied. Ultrastrong magnetic fields were generated by an