Abstract

The cluster approach to magnetic susceptibility (CAMS) has been used to determine the spin-Hamiltonian parameters for the quasi-one-dimensional next-nearest-neighbor chain compounds Cu(HzH)Cl3(J1=−4.84, J2=−5.66), Cu(amp)Cl2 (J1=−3.79, J2=−3.24), and Cu(Me3en)Br2 (J1=−3.45, J2=−3.06). We will explain the magnetic behavior of these compounds in terms of various structural parameters. Specifically, the discussion will focus on the possibility of predicting the magnitude and nature of the exchange coupling based on the geometry of the bridge, as well as the onset of phase transitions based on the extended structures.

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