Synthesis, crystal structure and magnetic properties of a new B-site ordered double perovskite Sr sub(2)CuIrO sub(6)

Here we synthesize and characterize a new double-perovskite oxide Sr sub(2)CuIrO sub(6). The synthesis requires the use of high oxygen pressure to stabilize the VI oxidation state of iridium. The compound has a tetragonally-distorted crystal structure due to the Jahn-Teller active Cu super(II) ion,...

Full description

Saved in:
Bibliographic Details
Published inJournal of solid state chemistry Vol. 220; pp. 28 - 31
Main Authors Vasala, Sami, Yamauchi, Hisao, Karppinen, Maarit
Format Journal Article
LanguageEnglish
Published 01.12.2014
Subjects
Cations
Crystal structure
Frustration
Iridium
Magnetic permeability
Magnetic properties
Oxides
Synthesis
Online AccessGet full text

Cover

More Information
Summary:Here we synthesize and characterize a new double-perovskite oxide Sr sub(2)CuIrO sub(6). The synthesis requires the use of high oxygen pressure to stabilize the VI oxidation state of iridium. The compound has a tetragonally-distorted crystal structure due to the Jahn-Teller active Cu super(II) ion, and a high degree of B-site cation order. Magnetic transition is apparent at 15 K, but the zero-field-cooled and field-cooled susceptibilities diverge below this temperature. The high degree of cation order would exclude the possibility of a typical spin-glass, indicating that the divergence is probably due to a frustration of the magnetic interactions between Cu and Ir, with a high frustration factor of f approximately 25.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
content type line 23
ObjectType-Feature-2
ISSN:0022-4596
DOI:10.1016/j.jssc.2014.08.008