Dalton Trans. Dalton Trans. Dodecanuclear [NiII8Ln₄] clusters and rings of corner-sharing {NiII2Ln₂} cubanes (Ln = Dy, Gd, Y); magnetic and magnetothermal properties Tziotzi Thomais G. Agapaki Eleftheria Charkiolakis Emmanouil K. Gracia David Ubach I. Cervera Marc Dalgarno Scott J. Evangelisti Marco Brechin Euan K. Milios Constantinos J. 2025 research-article