TY - JOUR
T1 - Synthesis and detailed characterization of bulk Sr2PdO3
AU - Bessas, D.
AU - Kantor, I.
AU - Bourazani, D.
AU - Georgalas, K.
AU - Biniskos, N.
AU - Zhang, L.
AU - Dugulan, A. I.
AU - Syskakis, E.
PY - 2019
Y1 - 2019
N2 - 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.
AB - 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.
KW - 4d transition metal oxide
KW - Experimental study
KW - Peculiar electronic properties
UR - http://www.scopus.com/inward/record.url?scp=85057600422&partnerID=8YFLogxK
U2 - 10.1016/j.physb.2018.10.048
DO - 10.1016/j.physb.2018.10.048
M3 - Article
AN - SCOPUS:85057600422
SN - 0921-4526
VL - 554
SP - 148
EP - 153
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
ER -