Two-step spin crossover phenomenon under high pressure in the coordination polymer Fe(3-methylpyridine)2[Ni(CN)4] - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Chemical Physics Letters Année : 2006

Two-step spin crossover phenomenon under high pressure in the coordination polymer Fe(3-methylpyridine)2[Ni(CN)4]

Résumé

The temperature dependence of the magnetic susceptibility and Mössbauer spectra of the compounds FeL2[Ni(CN)4] (L = 2, 3 or 4-methylpyridine) have been investigated. In each case the iron(II) ions are high spin at room temperature, but in the 3-methylpyridine compound about half of the iron ions becomes diamagnetic around 90 K. The application of external pressure allowed to uncover the underlying two-step nature of this spin transition. For further increase of the pressure the plateau between the two steps disappeared. Both observations were successfully interpreted in the framework of an Ising-like model with two iron sites displaying different volume changes.
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hal-00121475 , version 1 (16-03-2021)

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Gábor Molnár, Thomas Guillon, N.O Moussa, Lionel Rechignat, T. Kitazawa, et al.. Two-step spin crossover phenomenon under high pressure in the coordination polymer Fe(3-methylpyridine)2[Ni(CN)4]. Chemical Physics Letters, 2006, 423, pp.152-156. ⟨10.1016/j.cplett.2006.03.053⟩. ⟨hal-00121475⟩
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