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

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

2003-01-14

arxiv.org/abs/cond-mat/0301241v1

Physics

Condensed Matter

Superconductivity

6 pages, 3 figures, to be submitted to Physica C

Scientific paper

10.1016/S0921-4534(03)01323-6

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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