A two-step field-induced magnetic transition in spin-canted systems observed only for the CoII coordination polymer

Abstract

Two isostructural 1D compounds {[M₃(hpdc)₂(H₂O)₆]·2H₂O}_n (M = Mn, Co; H₃hpdc = 2-hydroxypyrimidine-4,6-dicarboxylic acid) were synthesized by the in situ hydrothermal reactions of 2-chloropyrimidine-4,6-dicarboxylic acid with MCl₂ (M = Mn, Co) and NaOH; the Mn^II compound shows spin-canted antiferromagnetism, whereas the Co^II compound exhibits the coexistence of spin-canting and a two-step field-induced magnetic phase transition.