Magnetization and magnetostriction oscillations in a superconducting 2H-NbSe2 single crystal

The results of a comparative study of the oscillating magnetostriction and absolute magnetization components in the single crystal of the layered supe rconducting compound 2H-NbSe2 are presented. The measurements were made in the temperature range 1.5-8 K in a magnetic field of 0-20 T with in-plane o rientation (normal to the hexagonal axis). The mechanical stress derivative of the extremal cross-sectional area of the Fermi surface is derived from a thermodynamic analysis. The values obtained are considerably higher, by a n order of magnitude, than those for other metals, which explains the obser ved enhancement of the magnetostriction oscillations in comparison with the magnetization oscillations. (C) 2001 American Institute of Physics.