Bitte benutzen Sie diese Referenz, um auf diese Ressource zu verweisen: doi:10.22028/D291-32736
Titel: Microstructure and Fluctuation-Induced Conductivity Analysis of Bi2Sr2CaCu2O8+δ (Bi-2212) Nanowire Fabrics
VerfasserIn: Koblischka, Michael Rudolf
Koblischka-Veneva, Anjela
Zeng, XianLin
Hannachi, Essia
Slimani, Yassine
Sprache: Englisch
Titel: Crystals
Bandnummer: 10
Heft: 11
Verlag/Plattform: MDPI
Erscheinungsjahr: 2020
Freie Schlagwörter: fluctuation-induced conductivity
microstructure
Bi-2212 superconductor
nanofiber fabrics
electrospinning
DDC-Sachgruppe: 500 Naturwissenschaften
530 Physik
600 Technik
Dokumenttyp: Journalartikel / Zeitschriftenartikel
Abstract: Resistance measurements were performed on Bi2Sr2CaCu2O8+δ (Bi-2212) fabric-like nanowire networks or nanofiber mats in the temperature interval 3 K ≤ T ≤ 300 K. The nanowire fabrics were prepared by means of electrospinning, and consist of long (up to 100 µm) individual nanowires with a mean diameter of 250 nm. The microstructure of the nanowire network fiber mats and of the individual nanowires was thoroughly characterized by electron microscopy showing that the nanowires can be as thin as a single Bi-2212 grain. The polycrystalline nanowires are found to have a texture in the direction of the original polymer nanowire. The overall structure of the nanofiber mats is characterized by numerous interconnects among the nanowires, which enable current flow across the whole sample. The fluctuation-induced conductivity (excess conductivity) above the superconducting transition temperature, Tc, was analyzed using the Aslamzov-Larkin model. Four distinct fluctuation regimes (short-wave, two-dimensional, three-dimensional and critical fluctuation regimes) could be identified in the Bi-2212 nanowire fabric samples. These regimes in such nanowire network samples are discussed in detail for the first time. Based on this analysis, we determine several superconducting parameters from the resistance data.
DOI der Erstveröffentlichung: 10.3390/cryst10110986
Link zu diesem Datensatz: urn:nbn:de:bsz:291--ds-327363
hdl:20.500.11880/30125
http://dx.doi.org/10.22028/D291-32736
ISSN: 2073-4352
Datum des Eintrags: 2-Dez-2020
Bezeichnung des in Beziehung stehenden Objekts: Supplementary Materials
In Beziehung stehendes Objekt: http://www.mdpi.com/2073-4352/10/11/986/s1
Fakultät: NT - Naturwissenschaftlich- Technische Fakultät
Fachrichtung: NT - Physik
Professur: NT - Prof. Dr. Uwe Hartmann
Sammlung:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

Dateien zu diesem Datensatz:
Datei Beschreibung GrößeFormat 
crystals-10-00986-v2.pdf3,04 MBAdobe PDFÖffnen/Anzeigen


Diese Ressource wurde unter folgender Copyright-Bestimmung veröffentlicht: Lizenz von Creative Commons Creative Commons