R. M. Eremina

Observation of a griffiths phase in paramagnetic La1-xSrxMnO3.

We report on the discovery of a novel triangular phase regime in the system La1-xSrxMnO3 by means of electron spin resonance and magnetic susceptibility measurements. This phase is characterized by the coexistence of ferromagnetic entities within the globally paramagnetic phase far above the magnetic ordering temperature. The nature of this phase can be understood in terms of Griffiths singularities arising due to the presence of correlated quenched disorder in the orthorhombic phase.

Anisotropic exchange inLiCuVO4probed by ESR

We investigated the paramagnetic resonance in single crystals of LiCuVO

Crystal field, Dzyaloshinsky-Moriya interaction, and orbital order in La 0.95 Sr 0.05 MnO 3 probed by ESR

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Structural and magnetic dimers in the spin-gapped system CuTe2O5

with special attention to the angular variation of the absorption spectrum. To explain the large resonance linewidth of the order of 1 kOe, we analyzed the anisotropic exchange interaction in the chains of edge-sharing CuO

Spin correlations and Dzyaloshinskii-Moriya interaction in Cs2CuCl4

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Electron spin resonance and exchange paths in the orthorhombic dimer system Sr2VO4

octahedra, taking into account the ring-exchange geometry of the nearest-neighbor coupling via two symmetric rectangular Cu-O bonds. The exchange parameters, which can be estimated from theoretical considerations, nicely agree with the parameters obtained from the angular dependence of the linewidth. The anisotropy of this magnetic ring exchange is found to be much larger than it is usually expected from conventional estimations which neglect the bonding geometry. Hence, the data yield the evidence that in copper oxides with edge-sharing structures the role of the orbital degrees of freedom is strongly enhanced. These findings establish LiCuVO

Alternating spin-orbital order in tetragonal Sr2VO4

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Magnetization and specific heat of the dimer system CuTe 2 O 5

as one-dimensional compound at high temperatures. PACS: 76.30.-v, 76.30.Fc, 75.30.Et

Unconventional Anisotropic Superexchange in alpha'-NaV~2O~5

We present a comprehensive analysis of the Dzyaloshinsky-Moriya interaction and crystal-field parameters using the angular dependence of the paramagnetic-resonance shift and linewidth in single crystals of

Anisotropic exchange in LiCu2O2

{\mathrm{La}}_{0.95}{\mathrm{Sr}}_{0.05}{\mathrm{MnO}}_{3}