Magnetic phase transition and magnetic structure of ground state in CsDyW O

Magnetic phase transition in the CsDyW2O8 magnet has been studied by means of low temperature specific heat C(T) measurements. The magnetic ordering temperature of the Dy3+ sublattice was established to be 1.34 K. The experimental results indicate on the antiferromagnetic character of interactions between Dy3+ ions. The behavior of the C(T) dependencies above and below TN is discussed in frames of different theoretical models. The measurements data on temperature and field dependencies of magnetization are used to calculate the exchange and dipole-dipole interactions energy and to determine the possible magnetic structure of the ground state.