EPR and electrical conductivity of the organic superconductor di-tetramethyltetraselenafulvalenium-perchlorate, (TMTSF)2ClO4 and a metastable magnetic state obtained by fast cooling
Résumé
EPR and electrical conductivity measurements under controlled thermal cycles demonstrate that a phase transition is occurring at about 22 K in (TMTSF)2ClO4. Slow cooling (12 K/h) yields a stable ground state exhibiting Pauli paramagnetism above and superconductivity below 1.2 K. In contrast, fast cooling (30 K/min.) yields a metastable magnetic (SDW) state below 4 K as indicated by increasing resistivity and disappearance of the EPR signal with decreasing temperature.
Mots clés
- Pauli paramagnetism
- resistivity
- phase transition
- EPR
- fast cooling
- metastable magnetic state
- TMTSF sub 2 ClO sub 4
- organic superconductor
- electrical conductivity
- one dimensional conductor
- SDW state
- superconducting transition temperature
- superconducting materials
- paramagnetic resonance
- paramagnetic properties of substances
- organic compounds
- one dimensional conductivity
- magnetic transitions
Domaines
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