Article Dans Une Revue Synthetic Metals Année : 1991

NMR and EPR analysis of spin and lattice fluctuations in the two-chain family of organic conductors Perylene2 [M(mnt)2 (M= Pt, Au)

Résumé

The temperature dependence of the 1H nuclear spinn lattice relaxation rate of the two-chain organic compounds Per2[M(mnt)2 (M= Pt, Au) (M=Au,Pt) is presented. For M=Pt, the dominant contribution to relaxation is the interstack dipolar coupling with the localised spins of the Pt(mnt)2 chains. The scaling relation T1-1 α T χ1 (T) is obeyed in the entire temperature range. The T1-1 temperature dependence for the Au compound is characteristic of itinerant electrons with deviations to the Korringa law in the high temperature range. The previously reported data on EPR for Per2[M(mnt)2 is also analysed and the possible mechanisms of the spin-Peirls like transition observed at 7 K are discussed.

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hal-04944481 , version 1 (06-03-2025)

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R.T. Henriques, C. Bourbonnais, P. Wzietek, D. Kongeter, J. Voiron, et al.. NMR and EPR analysis of spin and lattice fluctuations in the two-chain family of organic conductors Perylene2 [M(mnt)2 (M= Pt, Au). Synthetic Metals, 1991, 42 (3), pp.2339-2342. ⟨10.1016/0379-6779(91)91376-L⟩. ⟨hal-04944481⟩
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