The acoustic de Haas-van Alphen effect was investigated using ultrasonic velocity measurements. The oscillation intensities of the elastic constants were found to be highly anisotropic, even for magnetic field directions with crystallographic equivalence. This anisotropy depended strongly upon the polarization and propagation directions of the ultrasonic modes. The observed oscillation intensities were analyzed by means of the theory of the acoustic de Haas-van Alphen effect which was based upon the effective mass approximation. These analyses yielded the change in the cross-sectional areas of the Fermi surfaces via the ultrasonic wave and therefore the electron-lattice interaction. The characteristic features of the electron-lattice interactions for the main α Fermi surfaces at X points and for the small ρ Fermi surfaces on Σ lines were presented.

Acoustic De Haas-Van Alphen Effect of LaB6. Matsui, H., Goto, T., Kataoka, M., Suzuki, T., Harima, H., Kunii, S., Takayama, R., Sakai, O.: Journal of the Physical Society of Japan, 1995, 64[9], 3315-27