Anisotropic magnetic response in the superconducting mixed state of UPt3

K. Tenya, M. Ikeda, T. Tayama, T. Sakakibara, E. Yamamoto, K. Maezawa, N. Kimura, R. Settai, Y. Ōnuki

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56 Citations (Scopus)


Equilibrium magnetization Meq of the superconducting mixed state of UPt3 has been measured as a function of field. At low temperatures, the discontinuity of dMeq/dH at the upper critical field Hc2 exhibits marked anisotropy between the two principal directions of the hexagonal crystal, being indiscernibly small for H ⊥ c, where the normal state paramagnetic susceptibility is largest. The results are not simply explained by the effective mass anisotropy nor by the ordinary paramagnetic effect of a spin-singlet pairing; they are rather in favor of an odd-parity pairing with an appreciable anisotropy in the pair-spin correlation.

Original languageEnglish
Pages (from-to)3193-3196
Number of pages4
JournalPhysical Review Letters
Issue number15
Publication statusPublished - 1996


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