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Organic polymer ferromagnet


Low-dimensional, especially one-dimensional (1D), organic compounds are known to exhibit the properties of semiconductors, molecular metals and superconductors1. The theoretical prediction of 1D organic ferromagnets and the principles of construction of polymer polyradicals with a ground state spin proportional to a number of monomeric units were proposed in 1977–782,3. For nearly two decades various hydrocarbons of high spin multiplicity have been studied as the model of an organic ferromagnet4–6. Advanced quantum chemistry techniques have been applied for theoretical investigations of the electronic structure of such compounds7–9. Here we present a study of an organic polymer ferromagnetic preparation with a transition metal impurity content well below the level likely to significantly affect its magnetic properties. We find that all the organic polymer ferromagnet samples can be conditionally subdivided into three groups: paramagnetic polymers7–9, spin glasses10 and real polymer ferromagnets.

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Korshak, Y., Medvedeva, T., Ovchinnikov, A. et al. Organic polymer ferromagnet. Nature 326, 370–372 (1987).

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