An explanation of the critical epr linewidth transitions in hexammine nickel halides
- 1 August 1970
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 3 (8) , 1825-1830
- https://doi.org/10.1088/0022-3719/3/8/023
Abstract
It is shown that the point-charge model used by Bates and Stevens (1969) to explain the main features of the epr linewidth transitions and low-temperature entropy anomalies in hexammine nickel halides also predicts critical behaviour at temperatures Tc which depend on the halide. The critical behaviour arises from ordering of NH3 tetrahedra due to nearest-neighbour electrostatic interactions between point charges assigned to the protons of neighbouring (Ni(NH3)6)2+ clusters. The minimum free energy of the crystal is computed as a function of temperature and the critical behaviour is clearly demonstrated.Keywords
This publication has 3 references indexed in Scilit:
- An explanation of the electron paramagnetic transitions and low temperature entropy anomalies of hexammine nickel halidesJournal of Physics C: Solid State Physics, 1969
- Thermal properties of three nickel hexammine halides below 1°KPhysica, 1964
- Unusual low-temperature magnetic behaviour of some cubic crystalsPhysica, 1960