Magnetoacoustic antiresonance and multiple doppleron–phonon resonance in tungsten

The Doppler-shifted cyclotron resonance in the absorption of transverse ultrasound propagating along the [111] axis of tungsten is investigated in the case where the magnetic field H is directed in the (11¯0) and (112¯) planes. Magnetoacoustic antiresonance is observed, not only against the background of absorption associated with the quasisingle–particle interaction of electrons with sound, but also against the background of doppleron–phonon resonance. The dependence of the ultrasonic absorption on the frequency and on the angle between the direction of H and the [111] axis is investigated. It is shown that the “resonance–antiresonance” transformation observed in this case is attributable to the onset of multiple doppleron–phonon resonances. A new set of data is obtained on the differential characteristics of the Fermi surface of tungsten.

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