Pauli paramagnetism in d-wave superconductors

The effect of Pauli paramagnetism in d-wave superconductors like high-T-c c uprates and kappa-(ET)(2) salts is studied theoretically. We take the quasi -two-dimensional system with a magnetic Grid parallel to the a-b plans. We find many quantities obey simple power law in the clean limit. For example. [GRAPHICS] for T much less than mu(B)\H\ much less than T-c and mu(B) is the Bohr magn eton. On the other hand, small impurity scattering destroys these simple po wer laws. (C) 2000 Elsevier Science B.V. All rights reserved.