TY  - THES
AU  - Dietl, Christopher Johannes
TI  - Synthesis and Electronic Ordering Phenomena of Calcium Ruthenate Thin Films
PB  - University of Stuttgart
VL  - Dissertation
M1  - PUBDB-2018-05523
SP  - 238
PY  - 2018
N1  - Dissertation, University of Stuttgart, 2018
AB  - The prospect to harness the wide range of electronic phenomena foundin transition metal oxides by synthesizing thin film structures andtheir implementation into next-generation technologies has sparked aresearch activity of ever increasing pace. Most prominent are thin filmtechniques such as heterostructuring and strain engineering, whichhave been shown to open up new paths to study the rich physics inthese compounds.This work constitutes a study of the thin film synthesis of the lay-ered orthorhombic transition metal oxide compound Ca<sub>2</sub>RuO<sub>4</sub>(CRO)and of the impact of biaxial epitaxial strain on the magnetic and or-bital ordering phenomena previously found by spectroscopic methods.The electronic structure of CRO and other transition metal oxideswith4d-valence electrons is of significant topical interest, because theenergy scales of spin-orbit-coupling, exchange energy and crystal fieldare comparable.  As a result, the antiferromagnetic Mott insulatorCRO plays host to an array of novel ground states and is highly sus-ceptible to external perturbations as has been shown by numerousstudies on single crystals involving e.g pressure, chemical substitutionand electrical current.Embarking on the strategy to exploit this sensitivity of CRO, weemploy strain engineering via thin film growth to tune its properties.The details of the synthesis route using pulsed laser deposition arepresented. Growth was accomplished with two distinct sets of high-quality samples – a-axis oriented films on LaSrAlO<sub>4</sub> and NdCaAlO<sub>4</sub>substrates with (110) cut and c-axis oriented films on LaAlO<sub>3</sub>, LaSrAlO<sub>4</sub> and YAlO<sub>3</sub>substrates with (001) cut. Structural charac-terization shows that the epitaxy exerts strains of 1 
LB  - PUB:(DE-HGF)11
DO  - DOI:10.18419/OPUS-10069
UR  - https://bib-pubdb1.desy.de/record/417290
ER  -