219 citations · 642 across the 8 of their papers we have counts for
8 papers
Crystal Structure and Magnetic Properties of a new two-dimensional S=1 quantum spin system Ni_5(TeO_3)_4X_2 (X= Cl, Br)
M. Johnsson, K. W. Toernroos, P. Lemmens +1
Two new transition-metal tellurium oxy-chlorides of the general formula Ni_5(TeO_3)_4X_2 (X=Cl, Br) have been isolated during the investigation of the ternary phase diagram NiO-NiC…
Very low-frequency excitations in frustrated two-dimensional Heisenberg antiferromagnets
P. Carretta, R. Melzi, N. Papinutto +1
muSR and 7Li NMR relaxation measurements in frustrated two-dimensional S=1/2 Heisenberg antiferromagnets on a square lattice are presented. It is found that both in Li2VOSiO4 and L…
Evidence for an unconventional magnetic instability in the spin-tetrahedra system Cu_2Te_2O_5Br_2
P. Lemmens, K. -Y. Choi, E. E. Kaul +8
Thermodynamic experiments as well as Raman scattering have been used to study the magnetic instabilities in the spin-tetrahedra systems Cu_2Te_2O_5X_2, X=Cl and Br. While the phase…
Magnetic and thermodynamic properties of Li(2)VOSiO(4): a two-dimensional S=1/2 frustrated antiferromagnet on a square lattice
R. Melzi, S. Aldrovandi, F. Tedoldi +3
NMR, muSR, magnetization and specific heat measurements in Li(2)VOSiO(4) powders and single crystals are reported. Specific heat and magnetization measurements evidence that Li(2)V…
LiVGe2O6, an anomalous quasi 1D, system, as revealed by NMR
J. L. Gavilano, S. Mushkolaj, H. R. Ott +2
We report the results of Li nuclear magnetic resonance (NMR) studies of LiVGeO, a quasi one--dimensional spin model system, at low temperatures. Our data,…
LiVO(Si,Ge)O, a prototype of a two-dimensional frustrated quantum Heisenberg antiferromagnet
R. Melzi, P. Carretta, A. Lascialfari +4
NMR and magnetization measurements in LiVOSiO and LiVOGeO are reported. The analysis of the susceptibility shows that both compounds are two-dimensional Hei…
Biquadratic interactions and spin-Peierls transition in the spin 1 chain LiVGe2O6
P. Millet, F. Mila, F. C. Zhang +5
The magnetic susceptibility of a new one-dimensional, S=1 system, the vanadium oxide LiVGe2O6, has been measured. Contrary to previous S=1 chains, it exhibits an abrupt drop at 22…
Magnetic properties of the coupled ladder system MgVO
P. Millet, C. Satto, J. Bonvoisin +4
We present magnetic susceptibility measurements on MgVO, a compound in which the vanadium oxide planes have the same topology as in CaVO. The most striking property…