Notizen: Low-temperature Heat Capacity and Paramagnetic Susceptibility Measurements on some Tetragonal Nickel(II) Compounds
Open Access
- 1 October 1972
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung A
- Vol. 27 (10) , 1532-1534
- https://doi.org/10.1515/zna-1972-1031
Abstract
Zero-field splittings have been determined for the spin triplet ground state of Ni(II) in Ni (pyrazole) 4Cl2 and Ni(pyrazole) 4Br2, by means of heat capacity measurements in the 1-80 K region and by paramagnetic susceptibility measurements in the 2-80 K region. The results of both measurements can be fitted with theory using the spin Hamiltonian H=gßHS+D[Sz 2-S(S+1)/3]+E(Sx 2-Sy 2) with the parameter D equal to 7.2 cm-1 for the chloride and 5.4 cm-1 for the bromide. The value of E appeared to be close to zero for both compounds, indicating nearly axial symmetry. The anisotropic g-values (calculated from the susceptibility) are g⊥ = 2.21 ± 0.03 and g||= 2.14 for the chloride and g⊥ =2.20, g|| =2.12 for the bromide.Keywords
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