Abstract
Over 10 years pass after experimental discovery Josephson plasma resonance (JPR) in high-Tc superconductors. JPR spectroscopy became the powerful tool to study vortex phase diagram and interlayer electrodynamics in Josephson coupled layered superconductors like certain of high-Tc cuprates and molecular superconductors. We describe main principles of the JPR spectroscopy for measurement longitudinal plasma oscillations at the fundamental frequency ωp. That frequency and linewidth of resonance is directly related to the interlayer phase coherence. In this paper we report about developments and achievments in spectroscopy of JPR. The study of the vortex state of Bi 2 Sr 2 CaCu 2 O 8+δ and c-axis electrodynamics of Bi 2 Sr 2 CaCu 2 O 8+δ and Bi 2 Sr 2 CuO 6+δ w in zero magnetic field by JPR.
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