Structure and a 1/2-Like Magnetization Plateau in a S_eff = 1/2 Skew Chain Compound [Co₂(CH₃O-ip)(COOH)₂(H₂O)]_n

Abstract

] n is successfully synthesized by the hydrothermal reaction method. The compound crystallizes in the monoclinic structure with space group P2 1 /c, in which two inequivalent Co ions, bridged by a μ 2 -O monodentate formic acid ligand group, form one-dimensional skew chains along the b axis. The magnetic susceptibility and specific heat data indicate that the compound undergoes two magnetic phase transitions at T N1 = 5.8 K and T N2 = 6.6 K, respectively. Interestingly, the magnetization curve at 2 K presents a 1/2-like magnetization plateau based on the analysis of Hamiltonian diagonalization.

Synthesis, X-ray structures, and magnetic properties of seven polynuclear Cu(ii) complexes containing pyrazole-3,5-dicarboxylate with various ancillary ligands

“…19,20 The short magnetic bridging ligands such as carboxylate, pyrazole, azide, and cyanide are excellent candidates for constructing magnetic materials. [21][22][23][24][25][26][27][28] They can effectively transmit magnetic interactions between neighboring paramagnetic centers. In addition, the Cu-L-Cu angle (L = bridging atom), Cu-L-L-Cu torsion angle, and dihedral angle (g) between the coordination planes of Cu(II) centers can affect the sign and magnitude of exchange interactions.…”