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Muon Spin Rotation study of the $(TMTSF)_2ClO_4$ system

A. J. Greer·D. R. Harshman·W. J. Kossler·A. Goonewardene·D. Ll. Williams·E. Koster·W. Kang·R. N. Kleiman·R. C. Haddon
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Abstract

We report a study of the organic compound $(TMTSF)_2 ClO_4$ in both a sample cooled very slowly through the anion ordering temperature (relaxed state) and a sample cooled more rapidly (intermediate state). For the relaxed state the entire sample is observed to be superconducting below about T_c ~ 1.2 K. The second moment of the internal field distribution was measured for the relaxed state yielding an in-plane penetration depth of ~ 12000 Angstroms. The intermediate state sample entered a mixed phase state, characterized by coexisting macroscopic sized regions of superconducting and spin density wave (SDW) regions, below T_c ~ 0.87 K. These data were analyzed using a back-to-back cutoff exponential function, allowing the extraction of the first three moments of the magnetic field distribution. Formation of a vortex lattice is observed below 0.87 K as evidenced by the diamagnetic shift for the two fields in which we took intermediate state data.

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A. J. Greer, D. R. Harshman, W. J. Kossler, A. Goonewardene, D. Ll. Williams, E. Koster, W. Kang, R. N. Kleiman, R. C. Haddon. 2003-01-14. Muon Spin Rotation study of the $(TMTSF)_2ClO_4$ system. https://doi.org/10.1016/s0921-4534(03)01323-6

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