Author

Ryan DeRose

Publication Date

2018

Document Type

Dissertation/Thesis

First Advisor

Chmaissem, Omar

Degree Name

M.S. (Master of Science)

Department

Department of Physics

LCSH

Materials science

Abstract

Ba₁₋ₓNaₓFe₂As₂ is among the exciting new class of iron-pnictide unconventional superconductors. Like other iron arsenides, magnetic order and superconductivity compete with each other but can coexist at the right temperature and doping level. In Ba₁₋ₓNaₓFe₂As₂, there is a reentrant tetragonal phase that overlaps with the superconducting dome. The AFM order gives way to a rare double-Q SDW magnetic structure. It is of paramount importance that we elucidate the nature of the magnetic fluctuations in this material and what gives rise to, and suppresses, nematic order. This thesis also focuses extensively on the synthesis of Ba₁₋ₓNaₓFe₂As₂ single crystals and their characterization as a function of nominal stoichiometry and superconducting properties.

Comments

Advisors: Omar Chmaissem.||Committee members: Bogdan Dabrowski; Yasuo Ito.||Includes illustrations.||Includes bibliographical references.

Extent

62 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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