Abstract
The resistive transition to the superconducting state in the quasi-one dimensional molecular organic metal (TMTSF)2PF6 has been measured under 6 kbar pressure for magnetic fields applied along the intrachain (a), interchain (b′) and interplane (c*) directions. Pronounced positive curvature in Hc2(T) is observed, with no sign of saturation, in the basal plane directions a and b′, in contrast to previous publications on this material, but similar to recent results by Lee, et al. on a related compound, (TMTSF)2ClO4. A new crossover or reversal of anisotropy occurs near Tc/2, below which the critical field along b′ exceeds that along a. Moreover, Hc2 in these directions exceeds the Chandrasekhar-Clogston limit, reaching as much as 3 times HCC. The normal state magnetoresistance displays peculiar behavior in both materials at low temperature, with a local maximum in the vicinity of the superconducting transition. In addition, we report on a new series of angular magnetoresistance oscillations observed in both the ClO4 and PF6 salts.
Original language | English (US) |
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Pages (from-to) | 1481-1485 |
Number of pages | 5 |
Journal | Synthetic Metals |
Volume | 85 |
Issue number | 1-3 |
DOIs | |
State | Published - Mar 15 1997 |
Keywords
- Magnetotransport
- Molecular superconductors
- Superconducting phase transitions
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry