ИСТИНА

We report on the static and dynamic magnetic properties of quasi-1D (II/III) mixed-valent manganese tellurate LiMn2TeO6, which has been studied comprehensively through the magnetization, specific heat, neutron diffraction, dielectric permittivity, NMR and ESR techniques. The compound was found to order antiferromagnetically in two steps into incommensurate magnetic phase at TN1 ~ 20 K followed by commensurate one at TN2 ~ 14 K as confirmed from neutron data. Further more applied magnetic field leads to appearance of at least two additional field-induced phases resulting in complicated magnetic phase diagram. ESR studies indicate the presence of strong short-range correlation up to the temperature essentially higher magnetic ordering and short-range antiferromagnetic order maintained by the strong exchange interaction, exists up to much higher fields, of the order of the saturation magnetization field.