Ferromagnetic Interactions above Room Temperature in a Schiff-Base Metal-Organic Polymer

descriptionPublicationkeyboard_double_arrow_right Article 01 Nov 1989 English Publisher:Informa UK LimitedJournal:Molecular Crystals and Liquid Crystals Incorporating Nonlinear Optics, volume 176, pages 415-422 (issn: 1044-1859,

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Authors: Palacio, Fernando; Morón, M. Carmen; Garín, Javier; Reyes, Josefina; Fontcuberta, Josep;

doi: 10.1080/00268948908037498

handle: 10261/128686

Ferromagnetic Interactions above Room Temperature in a Schiff-Base Metal-Organic Polymer

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Abstract

The magnetic properties of an iron-bonded Schiff base polymer of general formula {[Fe(C13H17N3)2]SO4.6H2O}n are reported. Mössbauer spectroscopy shows that the polymer contains about 20±8 % of Fe3+ ions, despite the fact that only Fe2+ is used in the synthesis. A large out-of-phase component of the a.c. magnetic susceptibility is observed at zero external magnetic field and temperatures as high as 350 K. This result is characteristic of the presence of net magnetic moments in the material. The saturation magnetization is estimated to correspond to a saturation magnetic moment of 0.10 μB per structural repeating unit of the polymer.

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