EPR and electrical conductivity of the organic superconductor di-tetramethyltetraselenafulvalenium-perchlorate, (TMTSF)2ClO4 and a metastable magnetic state obtained by fast cooling

S. Tomić , D. Jérome , P. Monod , K. Bechgaard

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: magnetic transitions; one dimensional conductivity; organic compounds; paramagnetic properties of substances; paramagnetic resonance; superconducting materials; superconducting transition temperature; SDW state; one dimensional conductor; electrical conductivity; organic superconductor; TMTSF sub 2 ClO sub 4; metastable magnetic state; fast cooling; EPR; phase transition; Pauli paramagnetism; resistivity

Domaines: Articles anciens

S. Tomić, D. Jérome, P. Monod, K. Bechgaard. EPR and electrical conductivity of the organic superconductor di-tetramethyltetraselenafulvalenium-perchlorate, (TMTSF)2ClO4 and a metastable magnetic state obtained by fast cooling. Journal de Physique Lettres, 1982, 43 (23), pp.839-844. ⟨10.1051/jphyslet:019820043023083900⟩. ⟨jpa-00232133⟩