Magnetic resonance in molybdenum spinel-like compounds

2014 Measurements of the magnetic resonance linewidth 0394H of molybdenum spinels are reported for both paramagnetic and ferromagnetic phases, with particular attention to the region near critical temperature. The magnetic resonance spectra have been measured in the temperature range from 10 K to 300 K with a standard Xband ESR spectrometer. It was shown that the characteristic temperature changes of 0394H could be due to the influence of fast relaxing ions. For « pure » molybdenum spinels it can be qualitatively described in the frame of existing theories. The substitution of these spinels by nonmagnetic atoms (C, Si, Ge) significantly influences its critical behaviour, and the origin of this effect is not yet clear. J. Physique 46 (1985) 189-192 FTVRIER 1985, Classification Physics Abstracts 76.30201376.50