2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/165606The mixed spin-1/2 and spin-1 Ising-Heisenberg ferromagnet on the decorated triangular lattice consisting of inter-connected diamonds is investigated within the framework of an exact decoration-iteration mapping transformation. It is shown that the diamond-like decoration by a couple of the Heisenberg spins gives rise to a diverse critical behaviour including reentrant phase transitions with two consecutive critical points.4 pages, 2 figures, presented at 13th Czech and Slovak Conference on Magnetism (CSMAG'07), 9.-12. July 2007, Kosice, Slovakia, to be published in Acta Physica Polonica AStatistical Mechanicstext