Low-field electrodynamics of polycrystalline ternary molybdenum chalcogenides

The penetration of very weak magnetic fields into the polycrystalline low-temperature superconductor SnMo₆S₈ is studied experimentally. The experimental results agree satisfactorily with the theory of the critical state in the framework of low-field electrodynamics. It is found that the critical current density in this case does not depend on the dc magnetic field. Pis’ma Zh. éksp. Teor. Fiz. 69, No. 3, 184–188 (10 February 1999)