Enhanced magnetic and thermoelectric properties in epitaxial polycrystalline SrRuO3 thin film

Abstract

Transition metal oxide thin films show versatile electrical, magnetic, and thermal properties which can be tailored by deliberately introducing macroscopic grain boundaries via polycrystalline solids. In this study, we focus on the modification of the magnetic and thermal transport properties by fabricating single- and polycrystalline epitaxial SrRuO3 thin films using pulsed laser epitaxy. Using epitaxial stabilization technique with atomically flat polycrystalline SrTiO3 substrate, epitaxial polycrystalline SrRuO3 thin film with crystalline quality of each grain comparable to that of single-crystalline counterpart is realized. In particular, alleviated compressive strain near the grain boundaries due to coalescence is evidenced structurally, which induced enhancement of ferromagnetic ordering of the polycrystalline epitaxial thin film. The structural variations associated with the grain boundaries further reduce the thermal conductivity without deteriorating the electronic transport, and lead to enhanced thermoelectric efficiency in the epitaxial polycrystalline thin films, compared with their single-crystalline counterpart.

arXiv comment24 pages, 5 figures

References in corpus (8)

• Transport Properties, Thermodynamic Properties, and Electronic Structure of SrRuO3
• Critical thickness for itinerant ferromagnetism in ultrathin films of SrRuO${}_3$
• Enhanced electrocatalytic activity via phase transitions in strongly correlated SrRuO3 thin films
• Surface properties of atomically flat poly-crystalline SrTiO3
• Phase transitions via selective elemental vacancy engineering in complex oxide thin films
• Tuning electromagnetic properties of SrRuO3 epitaxial thin films via atomic control of cation vacancies
• BiFeO3/La0.7Sr0.3MnO3 heterostructures deposited on Spark Plasma Sintered LaAlO3 Substrates
• Enhanced metallic properties of SrRuO3 thin films via kinetically controlled pulsed laser epitaxy

Cited by in corpus (2)

• Propagation control of octahedral tilt in SrRuO3 via artificial heterostructuring
• Crystalline symmetry-dependent magnon formation in itinerant ferromagnet SrRuO3