Determination of the magnetic principal axes of a dysprosium complex with slow relaxation on a single crystal

Abstract

• The strong uniaxial anisotropy and magneto-structural correlations are investigated in a low-symmetry Dy(III) complex by angular-resolved magnetometry. • The ground state doublet component is analyzed by the magnetic susceptibility measurement along the magnetic easy axis. A mononuclear complex [Dy L 3 (H 2 O) 4 ]·5H 2 O ( 1 ) was synthesized by the assembly of an organic ligand of 2-(4-pyridyl)pyrimidine-4-carboxylic acid (H L ) with dysprosium nitrate. Magnetic studies indicate typical slow magnetic relaxation of a single-ion origin under an applied static magnetic field. Furthermore, the angular-resolved magnetometry measurements on a single crystal sample illustrates the obvious easy axial anisotropy with the g // value of 16.85 in this complex. The magnetic easy axis is determined along the direction of the second strongest coordination bond around dysprosium ion.