ISSN:
1057-9257
Keywords:
organic superconductor
;
a-(EDT-TTF)[Ni(dmit)2]
;
Ni(dmit)2 salt
;
electrical resistance
;
anisotropy
;
upper critical magnetic field
;
Ginzburg-Landau coherence length
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Electrical Engineering, Measurement and Control Technology
,
Physics
Notes:
The ambient-pressure superconductor a-(EDT-TTF)[Ni(dmit)2], which is a charge transfer salt formed between EDT-TTF and Ni(dmit)2, exhibits a superconducting transition at 1.3 K and a phase transition around 20 K featuring a characteristic resistance hump.We estimated that the room-temperature electrical conductivity was 140-370 and 14-36 S cm-1 for the current parallel and perpendicular to the conducting plane respectively. We measured the upper critical magnetic field (Hc2) in the superconducting phase. The temperature dependence of Hc2 was estimated |d Hc2/dT| T = Te = -0.27 T K-1 (B||c-axis); |dHc2/d T| T = Tc = -3.5 T K-1 (B||ab-plane). The anisotropy of Hc2 within the ab-plane was found to be quite small, indicating a two-dimensionally isotrope character within the ab-plane in the superconducting state of the salt.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
