The stress dependence of the fermi surface of molybdenum. I. The electron lenses

Abstract

Simultaneous measurements of oscillatory magnetostriction amplitudes and de Haas-van Alphen torque amplitudes have been made in molybdenum in magnetic fields up to 22 kOe. From these results we determined the uniaxial stress dependence of various extremal cross sections of the electron lenses in the fifth band. The lenses along an axis parallel to the stress are approximately ten times more sensitive to distortion than the lenses in a plane perpendicular to the stress direction. The experimental values are in agreement with the results obtained with Pettifor's energy-independent model Hamiltonian, describingd electrons only. We found that this model gives a good description of thed-band structure and its stress dependence provided the hybridization is taken into account. The validity of the rigid-band description is discussed in detail in terms of Pettifor's model.