Magnetization Studied as a Function of Temperature and Magnetic Field for Ferromagnetic Transition in DMNaFe

Abstract

Magnetization has been calculated as a function of temperature in the ferromagnetic phase of (CH 3 ) 2 NH 2 Na 0.5 Fe 0.5 (HCOO) 3 denoted by DMNaFe as one of the metal formate framework by using molecular field theory. Calculated M(T) is compared with the magnetization measured as a function of temperature (H = 10 Oe) in field-cooling and zero-field-cooling regimes from the literature, and a power-law analysis of the experimental data was performed for DMNaFe. Magnetization measured as a function of the magnetic field, as reported in the literature, has also been analyzed by the power-law formula. The magnetization indicates a weak first-order (or nearly second-order) ferromagnetic transition in DMNaFe.