Temperature and the field dependence of the magnetization close to order–disorder phase transitions in DMMn and the chromium-doped DMMn.

Graphical abstract This work gives our calculation of the magnetization as a function of temperature by the molecular field theory for the DMMn and the chromium-doped DMMn (Cr1, Cr2 and Cr3) close to phase transitions. Our calculated M (T) values are compared with the experimantal data from the literature. We also analyze the temperature and the field dependence of the magnetization M (T , H) by using the literature data through the power-law formula. This analysis is carried out for the nearly second order transition in DMMn and the chromium-doped DMMn. This method of calculating magnetization and its analysis motivate describe ferromagnetic transitions in those compounds studied and also in similar structures in the metal organic frameworks (MOFs). Abstract We study the temperature and field dependence of the magnetization M (T , H) for the order–disorder transition in DMMn and the chromium-doped DMMn close to T C. By analyzing the experimental data for M (T , H) from the literature according to the power-law formula, values of the critical exponent (β) and the critical isotherm (δ) are deduced and also, the temperature dependence of magnetization M (T) is calculated from the molecular field theory for those compounds. Our calculated M (T) and the values of β and δ from the analysis of M (T , H) indicate that DMMn and chromium-doped DMMn undergo nearly second order transition. [ABSTRACT FROM AUTHOR]