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doi:10.22028/D291-32641
Titel: | Excess Conductivity Analysis of Polycrystalline FeSe Samples with the Addition of Ag |
VerfasserIn: | Koblischka, Michael Rudolf Slimani, Yassine Koblischka-Veneva, Anjela Karwoth, Thomas Zeng, XianLin Hannachi, Essia Murakami, Masato |
Sprache: | Englisch |
Titel: | Materials |
Bandnummer: | 13 |
Heft: | 21 |
Verlag/Plattform: | MDPI |
Erscheinungsjahr: | 2020 |
Freie Schlagwörter: | iron-based superconductors FeSe silver addition microstructure resistance fluctuation-induced conductivity |
DDC-Sachgruppe: | 500 Naturwissenschaften 530 Physik 600 Technik |
Dokumenttyp: | Journalartikel / Zeitschriftenartikel |
Abstract: | Bulk FeSe superconductors of the iron-based (IBS) “11” family containing various additions of silver were thoroughly investigated concerning the microstructure using optical microscopy and electron microscopy (TEM and SEM). The measurements of electrical resistivity were performed through the four-point technique in the temperature interval T = 2–150 K. The Aslamazov–Larkin model was employed to analyze the fluctuation-induced conductivity (FIC) in all acquired measurements. In all studied products, we found that the FIC curves consist of five different regimes of fluctuation, viz. critical region (CR), three-dimensional (3D), two-dimensional (2D), one-dimensional (1D), and shortwave fluctuation (SWF) regimes. The critical current density (Jc), the lower and upper critical magnetic fields (Bc1 and Bc2), the coherence length along the c-axis at zero-temperature (ξc(0)), and further parameters were assessed with regards to the silver amount within the products. The analyses discloses a diminution in the resistivity and a great reduction in ξc(0) with Ag addition. The optimal silver doping amount is achieved for 7 wt.%, which yields the best superconducting transition and the greatest Jc value. |
DOI der Erstveröffentlichung: | 10.3390/ma13215018 |
Link zu diesem Datensatz: | urn:nbn:de:bsz:291--ds-326415 hdl:20.500.11880/30048 http://dx.doi.org/10.22028/D291-32641 |
ISSN: | 1996-1944 |
Datum des Eintrags: | 17-Nov-2020 |
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 | Größe | Format | |
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materials-13-05018-v2.pdf | 4,2 MB | Adobe PDF | Öffnen/Anzeigen |
Diese Ressource wurde unter folgender Copyright-Bestimmung veröffentlicht: Lizenz von Creative Commons