Chiral weak ferromagnets formed in one-dimensional organic-inorganic hybrid manganese chloride hydrates

Chiral weak ferromagnets were developed in organic-inorganic hybrid systems of one-dimensional manganese(II) chloride hydrate with chiral organic cations of (S)- and (R)-β-methylphenethylammonium (= (S)- and (R)-MPA⁺), [(S)/(R)-MPA]₂[MnCl₄(H₂O)]. The weak ferromagnetic phase found below 3.2 K could be attributed to a spin canting antiferromagnetic state induced by Dzyaloshinskii-Moriya interactions owing to spatial inversion symmetry breaking in chirality introduced systems. This is the first chiral weak ferromagnet found in a spin chain of deformed perovskite derivatives with a corner-sharing structure of transition metal halide hydrates.