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Study of the peak effect phenomenon in single crystals of 2H-NbSe2 |
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| Authors: | CV Tomy D Pal SS Banerjee S Ramakrishnan AK Grover S Bhattacharya MJ Higgins G Balakrishnan McK Paul |
| Institution: | (1) Department of Physics, Indian Institute of Technology, 400 076 Powai, Mumbai, India;(2) Tata Institute of Fundamental Research, Homi Bhabha Road, 400 005 Mumbai, India;(3) Department of Condensed Matter Physics, Weizmann Institute of Science, 76100 Rehovot, Israel;(4) N.E.C. Research Institute, 4 Independence Way, 08540 Princeton, New Jersey, USA;(5) Department of Physics, University of Warwick, CV4 7AL Coventry, UK |
| Abstract: | The weakly pinned single crystals of the hexagonal 2H-NbSe2 compound have emerged as prototypes for determining and characterizing the phase boundaries of the possible order-disorder transformations in the vortex matter. We present here a status report based on the ac and dc magnetization measurements of the peak effect phenomenon in three crystals of 2H-NbSe2, in which the critical current densities vary over two orders of magnitude. We sketch the generic vortex phase diagram of a weakly pinned superconductor, which also utilizes theoretical proposals. We also establish the connection between the metastability effects and pinning. |
| Keywords: | Peak effect vortex phase diagram order to disorder transformation 2H-NbSe2 |
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