BaCo2V2O8 is a nice example of a quasi-one-dimensional quantum spin system that can be described in terms of Tomonaga-Luttinger liquid physics. This is explored in the present study where the magnetic field-temperature phase diagram is thoroughly established up to 12 T using single-crystal neutron diffraction. The transition from the Néel phase to the incommensurate longitudinal spin density wave (LSDW) phase through a first-order transition, as well as the critical exponents associated with the paramagnetic-Néel phase transition, and the magnetic order both in the Néel and in the LSDW phase are determined, thus providing a stringent test for the theory.
Vse pravice prdržane @ 2015. Odsek za fiziko trdne snovi