| Issue |
J. Phys. Colloques
Volume 49, Number C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|---|---|---|
| Page(s) | C8-1811 - C8-1812 | |
| DOI | https://doi.org/10.1051/jphyscol:19888827 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-1811-C8-1812
DOI: 10.1051/jphyscol:19888827
D.C.I.T.T.Y.M., Facultad de Ciencias, Universidad de Cantabria, 39005 Santander, Spain
J. Phys. Colloques 49 (1988) C8-1811-C8-1812
DOI: 10.1051/jphyscol:19888827
MAGNETIC PROPERTIES OF PRECIPITATED PHASES IN Mn2+ DOPED ALKALI HALIDES
M. Moreno, F. Rodriguez et J.C. Gomez SalD.C.I.T.T.Y.M., Facultad de Ciencias, Universidad de Cantabria, 39005 Santander, Spain
Abstract
The susceptibility and specific heat data on NaCl : Mn2+ in the 0.07-4.2 K range reflect the existence of an antiferromagnetic phase transition at TN = 0.2 K. Below TN, the susceptibility reveals the presence of loose spins associated to Mn2+ in (or near) the surface of the Suzuki phase precipitates. The E.P.R., susceptibility and optical, measurements performed on RbCl : Mn2+ indicate that the nature of the precipitates is not MnCl2, RbMnCl3, Rb2MnCl4 or Rb2MnCl7, but the distorted Mn Cl4-6 units must share some common Cl- ions in order to explain the values θp = -124 K and TN = 72 ± 5 found for this new material inserted in RbCl.