Bitte benutzen Sie diese Kennung, um auf die Ressource zu verweisen:
http://dx.doi.org/10.18419/opus-5047
Autor(en): | Balthes, Eduard Breining, Angela Kahlich, Siegfried Moldenhauer, Jörg Schweitzer, Dieter Bele, Petra Brunner, Hermann Heinen, Ilsabe Nuber, Bernhard Keller, Heimo J. |
Titel: | Superconductivity in polycrystalline pressed pellets of k-(BEDT-TTF)2I3 |
Erscheinungsdatum: | 1993 |
Dokumentart: | Zeitschriftenartikel |
Erschienen in: | Synthetic metals 56 (1993), S. 2859-2864 |
URI: | http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-65736 http://elib.uni-stuttgart.de/handle/11682/5064 http://dx.doi.org/10.18419/opus-5047 |
Zusammenfassung: | Investigations of the transport properties of single crystals and polycrystalline pressed samples of K-( BEDT-TTF)2I3 are presented. In contrast to polycrystalline pressed samples of K-(BEDT-TTF)2Cu(NCS)2 and K-(BEDT-TTF)2Cu [N(CN)2]Br those of K-(BEDT-TTF)2I3 show bulk superconductivity indicating that the loss of superconductivity in the first two types of samples is not due to the special structure of the K-phase, but probably due to a disproportionation of Cu1+ under the anisotropic pressure during the preparation of the samples. Annealing the single crystals as well as the polycrystalline pressed samples of K-(BEDT-TTF)2I3 at 75°C for a few days results in a structural transfomation with an increase in the transition temperature for superconductivity (about 8 K for the crystals). IR-spectra indicate a transfomatlon into a structure which is identical with αt-(BED-TTF)2I3 which seems to be the thermodynamically most stable phase of the several (BEDT-TTF)2I3 phases. |
Enthalten in den Sammlungen: | 08 Fakultät Mathematik und Physik |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
---|---|---|---|---|
schw176.pdf | 1,31 MB | Adobe PDF | Öffnen/Anzeigen |
Alle Ressourcen in diesem Repositorium sind urheberrechtlich geschützt.