Synthesis and Characterization of New Compounds Structurally Related to Superconducting Iron-Pnictides: In the system Ae–T–E (Ae = Ca, Sr, Ba; T = Fe Co, Ni, Rh; E = Si, Ge, P, As)

Hoffmann, Andrea Viola

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Lehrstuhl für Anorganische Chemie mit Schwerpunkt Neue Materialien (Prof. Fässler)

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Original title:: Synthesis and Characterization of New Compounds Structurally Related to Superconducting Iron-Pnictides
Original subtitle:: In the system Ae–T–E (Ae = Ca, Sr, Ba; T = Fe Co, Ni, Rh; E = Si, Ge, P, As)
Translated title:: Synthese und Charakterisierung von neuen Verbindungen mit struktureller Verwandtschaft zu Eisen-Pniktid Supraleitern
Translated subtitle:: Im Phasensystem Ae–T–E (Ae = Ca, Sr, Ba; T = Fe Co, Ni, Rh; E = Si, Ge, P, As)
Author:: Hoffmann, Andrea Viola
Year:: 2015
Document type:: Dissertation
Faculty/School:: Fakultät für Chemie
Advisor:: Fässler, Thomas F. (Prof. Dr.)
Referee:: Fässler, Thomas F. (Prof. Dr.); Nilges, Tom (Prof. Dr.)
Language:: en
Subject group:: CHE Chemie
TUM classification:: CHE 380d
Abstract:: This thesis focuses on the syntheses of chemical compounds with ThCr₂Si₂ structure type, analogous to the superconducting iron-pnictides, and related structures including the investigation of their structural and physical properties. The effects of charge doping were studied with respect to their electronic structures and superconducting behavior. The variations in the structural parameters with focus on the tunable E–E distances and the effect of partial substitution on the T_c are discussed. In addition binary Ca–As compounds were synthesized and characterized. «
This thesis focuses on the syntheses of chemical compounds with ThCr₂Si₂ structure type, analogous to the superconducting iron-pnictides, and related structures including the investigation of their structural and physical properties. The effects of charge doping were studied with respect to their electronic structures and superconducting behavior. The variations in the structural parameters with focus on the tunable E–E distances and the effect of partial substitution on the T_c are discussed. In... »
Translated abstract:: In dieser Arbeit werden neue Verbindungen mit ThCr₂Si₂ Strukturtyp, in dem auch Eisen-Pniktid Supraleiter kristallisieren, und verwandten Strukturtypen sowie deren strukturellen und physikalischen Eigenschaften analysiert. Der Einfluss von Ladungsvariationen durch Teilsubstitution wurde im Hinblick auf die elektronische Struktur und Supraleitfähigkeit der Verbindungen untersucht. Die Variationen der Strukturparameter mit Blick auf den flexiblen E–E Abständen und der Einfluss von partieller Substitution auf die Sprungtemperatur T_c werden diskutiert. Zusätzlich wurden binäre Ca–As Verbindungen synthetisiert und charakterisiert.
WWW:: https://mediatum.ub.tum.de/?id=1276634
Date of submission:: 22.09.2015
Oral examination:: 04.12.2015
File size:: 13915091 bytes
Pages:: 219
Urn (citeable URL):: https://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:91-diss-20151204-1276634-1-6
Last change:: 30.03.2016
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