Abstract

Through experimentation and analysis of the cyclotron resonance, the [110] arm in the electron Fermi surface of lead has been found to be a corrugated cylinder having different shapes of longitudinal cross section cut by various planes including the axis of the arm. The resonance amplitude of the orbit ζ on the [110] arm is also dependent on the crystallographic differences of the surfaces, even for the same orientation of the magnetic field. The best fitting of the theoretical overall line shape to the observed one of the orbit ζ has been obtained by considering the decrease of relaxation time for higher indices of harmonic resonance. The second and third harmonics are well understood in terms of the theory of surface impedance by Chambers and by Tsuji et al. The rapid broadening of the line shapes of much higher harmonics is attributed to the relation between the cyclotron orbit radius and the range of dislocation strain field. Identification of the orbit ω has been also made.

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