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Authors: Schweitzer, Dieter
Bele, Petra
Brunner, Hermann
Gogu, Emil
Haeberlen, Ulrich
Hennig, Ingolf
Klutz, Thomas
Swietlik, Roman
Keller, Heimo J.
Title: A stable superconducting state at 8K and ambient pressure in αt-(BEDT-TTF)2I3
Issue Date: 1987 Zeitschriftenartikel Zeitschrift für Physik, B 67 (1987), S. 489-495. URL
Abstract: We report bulk superconductivity at 8 K and ambient pressure in crystals of α t (BEDT-TTF)2I3. In contrast to the earlier observed metastable superconducting state at 8 K in crystals of β-(BEDT-TTF)2I3 here the superconducting state is stable and the crystals can be prepared by tempering α-(BEDT-TTF)2I3 above 70 °C for several days. ac-susceptibility measurements show that the observed superconducting state at 8 K is a bulk property of the crystals. Resistivity measurements indicate a sharp superconducting transition at 8 K with an onset temperature of about 9 K. The upper critical fields Hc2 at 1.3 K lie between 3 and 11 T depending on the direction of the magnetic field with respect to the crystal axes. ESR- as well as NMR-measurements indicate a total transformation of the α-phase crystals into the new superconducting α t -crystals after tempering.
Appears in Collections:08 Fakultät Mathematik und Physik

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