Mert, H. SevkiMert, Gulistan2020-03-262020-03-262013978-0-7354-1185-20094-243Xhttps://dx.doi.org/10.1063/1.4825768https://hdl.handle.net/20.500.12395/2972311th International Conference of Numerical Analysis and Applied Mathematics (ICNAAM) -- SEP 21-27, 2013 -- GREECEWe present a numerical study of a three-sublattice mixed ferro-ferrimagnetic Heisenberg system. Green's function technique is used to calculate the magnetization as a function of temperature. The technique involves the random phase approximation and Anderson-Callen's decoupling. We obtain phase diagram and the first-order phase transition.en10.1063/1.4825768info:eu-repo/semantics/closedAccessHeisenberg ModelGreen's FunctionFerromagnetic SystemFerrimagnetic SystemPhase TransitionConference Object155813651366N/AWOS:000331472800323N/A