Frequency and temperature dependence of conduction-electron spin resonance in a highly enhanced-susceptibility metal: TiBe2

The conduction-electron spin resonance of the highly enhanced- susceptibility metal TiBe2 was investigated in the large frequency range of 0.2-36 Gc/sec at temperatures below 25 K. Subtracting demagnetization broadening, the linewidth increases linearly with frequency up to 10 Gc/sec; it increases more than linearly at 36 Gc/sec. The results are discussed in relation to the g-value anisotropy of the conduction electrons on the Fermi surface. Observed deviation from the Elliot relation below 20 K may arise from paramagnon relaxation.