Synthesis and detailed characterization of bulk Sr<sub>2</sub>PdO<sub>3</sub>

Journal article (2019)

Authors

D. Bessas RST/Fundamental Aspects of Materials and Energy - AS
I. Kantor European Synchrotron Radiation Facility
D. Bourazani National and Capodistrian University of Athens
K. Georgalas National and Capodistrian University of Athens
N. Biniskos Institut Laue-Langevin, Université Grenoble Alpes
Letian Zhang BASF Nederland B.V.
A.I. Dugulan RID/TS/Instrumenten groep , RST/Fundamental Aspects of Materials and Energy - AS
E. Syskakis National and Capodistrian University of Athens
Research Group
RST/Fundamental Aspects of Materials and Energy (AS) (TU Delft)
Experimental study 4d transition metal oxide Peculiar electronic properties
More Info
expand_more

Published Date

2019

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Applied Sciences

Department

RST/Radiation, Science and Technology

Research Group

RST/Fundamental Aspects of Materials and Energy

Abstract

Bulk Sr2PdO3 was synthesized by a modified solid state reaction and a detailed characterization was carried out using both microscopic and macroscopic experimental techniques. Pd site exhibits an electric field gradient of 5.9(1) ⋅ 1017 V/cm2 due to the anisotropic local atomic configuration. A Curie - paramagnetic susceptibility indicating antiferromagnetic interactions superimposed to a core diamagnetic state is confirmed. A linear volume thermal expansion with a coefficient of 3.0(1) ⋅ 10−5 K−1 at room temperature is extracted. A collection of Einstein oscillators, with an Einstein temperature of about 115 K, is involved in the thermal transport. Large atomic displacements were observed in Sr vibrations. No Pd or Sr valence change is observed up to 900 K. A moderate anharmonicity is identified and quantified in a macroscopic Grüneisen parameter of 2.5(1) at room temperature. The electrical resistivity reveals a semiconducting behaviour. A systematic reduction in electrical resistivity and a change in the conduction mechanism is observed upon thermal cycling which indicates that a peculiar electronic mechanism is involved.