Infrared, Raman and EPR spectra are used to characterize the charge and spin distribution on the molecules of the title compound which was before found to have a ferromagnetic phase also at room temperature. We find that the charges and spins are localized on the tight dimers present in the crystal, a situation which is consistent with a local diamagnetic ground state which cannot determines a spin polarization of the system. We also studied some defects of the crystals which seem to generate in the crystallization. We produced these defects by grinding the crystals and found that they have a spin and are likely to be charged. Preliminary magnetic measurements do not allow us, however, to conclude that such defects are involved in the ferromagnetic behavior of the compound.
Spectroscopic studies of (TCNQF4)3[N(CH3)4]2
MENEGHETTI, MORENO;TOFFOLETTI, ANTONIO
1999
Abstract
Infrared, Raman and EPR spectra are used to characterize the charge and spin distribution on the molecules of the title compound which was before found to have a ferromagnetic phase also at room temperature. We find that the charges and spins are localized on the tight dimers present in the crystal, a situation which is consistent with a local diamagnetic ground state which cannot determines a spin polarization of the system. We also studied some defects of the crystals which seem to generate in the crystallization. We produced these defects by grinding the crystals and found that they have a spin and are likely to be charged. Preliminary magnetic measurements do not allow us, however, to conclude that such defects are involved in the ferromagnetic behavior of the compound.
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