Interlayer dissipation in magnetic fields for H parallel to J in kappa-(ET)(2)I-3

In this paper, we report transport measurements of the interlayer magnetore sistance with field, H, parallel to the current, J, in the organic supercon ductor kappa-(bis(ethylenedithio)-tetrathiafulvalene (ET))(2)I-3. The isoth ermal magnetoresistance R(H) displays a peak as a function of field for 1 > T/T-c greater than or equal to 0.4. At lower temperatures T/T-c < 0.4, R(H ) increases monotonically with field. Comparison with several other organic superconductors suggests the interlayer magnetoresistance peak is intrinsi c to layered systems. Quantitative analysis shows that the magnetoresistanc e at small field can be fitted to the stacked Josephson-junction model with the normalized coupling energy proportional to (1 - T/T-c)(3/2)/H. (C) 200 0 Elsevier Science B.V. All rights reserved.