J. Phys. IV France
Volume 03, Numéro C2, Juillet 1993
International Workshop on Electronic Crystals
ECRYS - 93
Page(s) C2-27 - C2-32
International Workshop on Electronic Crystals
ECRYS - 93

J. Phys. IV France 03 (1993) C2-27-C2-32

DOI: 10.1051/jp4:1993205

Evidence for possible interaction between CDW and magnetic vortices in 2H-NbSe2 : comparison with 2H-NbS2

Z. XU1, H. DRULIS1, 2, L.E. DELONG1 and J.W. BRILL1

1  Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506-0055, U.S.A.
2  Trzebiatowsi Institute of Low Temperature and Structure Research, Polish Academy of Science, 50-950 Wroclaw 2, P.O. Box 937, Poland

We have performed vibrating reed (f~1 kHz) and ac susceptibility (f~800 kHz, i.e. RF penetration depth) measurements on superconducting 2H-NbSe2 and 2H-NbS2 in magnetic fields. For NbSe2, a low temperature dissipation peak is correlated with a dip in vibrating reed resonant frequency and peak in ac susceptibility, signifying softening of the flux line lattice ; these features are not observed in NbS2. We suggest that the softening of the FLL is due to an interaction with the CDW, which does not occur in NbS2.

© EDP Sciences 1993