Dodecanuclear [NiII8Ln4] clusters and rings of corner-sharing {NiII2Ln2} cubanes (Ln = Dy, Gd, Y); magnetic and magnetothermal properties

} unit. Magnetization studies conducted on complexes 1-3 demonstrate the presence of dominant ferromagnetic exchange at low temperatures, which is largely attributed to the Ni⋯Ni interactions. The significant magnetocaloric effect observed in the Gd analogue has been assessed through heat capacity and magnetization measurements.