Topological ferrimagnetic behavior of one new chain with the new AF/F/F′/F′/F alternating sequence
Cano, Joan; Journaux, Yves; Goher, Mohamed A. S.; Abu-Youssef, Morsy A. M.; Mautner, Franz A.; Reiβ, Guido J.; Escuer, Albert; Vicente, Ramon; Cano Joan; Laboratoire de Chimie Inorganique (CNRS UMR 8613), Université de Paris-Sud; Journaux Yves; Laboratoire de Chimie Inorganique (CNRS UMR 8613), Université de Paris-Sud; Goher Mohamed A. S.; Chemistry Department, Faculty of Science, Alexandria University; Abu-Youssef Morsy A. M.; Chemistry Department, Faculty of Science, Alexandria University; Mautner Franz A.; Institut für Physikalische und Theoretische Chemie, Technische Universität Graz; Reiβ Guido J.; Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf; Escuer Albert; Departament de QuÃmica Inorgà nica, Universitat de Barcelona; Vicente Ramon; Departament de QuÃmica Inorgà nica, Universitat de Barcelona
Журнал:
New Journal of Chemistry
Дата:
2005
Аннотация:
An azido-bridged chain with formula [Mn(Menic)(N3)2]n, where Menic is methylnicotinate, was prepared and studied from the magnetic point-of-view. This compound crystallizes in the monoclinic system, space group P21/a, with a = 15.556(2), b = 16.831(2), c = 17.595(2) ⠫, β = 110.80(1)° and Z = 10. The structure consist of a one-dimensional system in which each manganese atom is bridged by two azido ligands in a trans arrangement. Along the chain there are four double end-on azido bridges followed by one double end-to-end azido bridge. This unusual kind of alternation leads to a new one-dimensional magnetic behavior, which has been studied by means of susceptibility and single crystal ESR measurements. The magnetic response has been reproduced by Monte Carlo simulations and exact laws following the classical approach. The characteristic signature of the magnetic behavior has allowed us to determine the three different magnetic coupling constants present in this system. These results have been analyzed in the framework of a theoretical and experimental magneto-structural correlation.
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