High-temperature susceptibility of copper compounds containing CuCl2- 4 or Cu2Cl2- 6 ions

Citation:
Mostafa, M.F., S. A. M. M. A., "High-temperature susceptibility of copper compounds containing CuCl2- 4 or Cu2Cl2- 6 ions", Physica B+C, vol. 86-88, no. PART 2, pp. 691-692, 1977.

Abstract:

We have measured the magnetic susceptibility of [(C2H5)2NH2]2 CuCl4, (iso-C3H7NH3)2CuCl4, and (iso-C3H7NH3)CuCl3 in the temperature range 80 < T < 400 K. These compounds show thermochrimic first order phase transitions at 315.5, 329.5 and 324.5 K, respectively, which is related to the change in geometry of the chlorine coordination of Cu2+. From the susceptibility data, estimates of the super-exchange interaction can be inferred. For [(C2H5)2NH2]2CuCl4 and (iso-C3H7NH3)2CuCl4 our results evidenced the presence of ferromagnetic interactions between the Cu ions within the network formed by CuCl2- 4 ions. For the (iso-C3H7NH3)CuCl3 the interaction between two Cu2+ ions forming the dimer can be estimated. The interaction between the dimers is found to be much weaker. © 1977.

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