2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/103229Motivated by the recent experimental studies on layered ferromagnetic metallic system GdI2 and its doped variant GdI2Hx we develop a model to understand their ground state magnetic phase diagram. Based on first principle electronic structure calculations we write down a phenomenological model and solve it under certain approximations to obtain the ground state energy. In the process we work out the phase diagram of the correlated double exchange model on a triangular lattice for the specific band structure at hand.13 pages, 5 figures, corrected typosOther Condensed Mattertext