Back to Search
Start Over
High-pressure crystal growth and magnetic and electrical properties of the quasi-one dimensional osmium oxide Na2OsO4
- Source :
- Journal of Solid State Chemistry. 183:402-407
- Publication Year :
- 2010
- Publisher :
- Elsevier BV, 2010.
-
Abstract
- Na2OsO4 crystals were grown by a NaCl flux method under high pressure. It crystallizes in the Ca2IrO4-type structure without having additional elements or metal vacancies, which are usually accommodated. It appears that Na2OsO4 is a metal-stoichiometric Ca2IrO4-type compound never been synthesized to date. Na2OsO4 has the octahedral environment of Os6+O6 so that the electronic configuration is 5d2, suggesting the magnetic S=1 ground state. However, magnetization, electrical resistivity, and specific heat measurements indicated that the non-magnetic S=0 state is much likely for Na2OsO4 than the S=1 state. Band structure calculations and the structure analysis found that the disagreement is probably due to the statically uniaxial compression of the OsO6 octahedra, resulting in splitting of the t 2 g band.
- Subjects :
- Flux method
Condensed matter physics
Chemistry
Inorganic chemistry
Osmium oxide
Crystal growth
Electronic structure
Condensed Matter Physics
Electronic, Optical and Magnetic Materials
Inorganic Chemistry
Magnetization
Electrical resistivity and conductivity
Materials Chemistry
Ceramics and Composites
Physical and Theoretical Chemistry
Electronic band structure
Ground state
Subjects
Details
- ISSN :
- 00224596
- Volume :
- 183
- Database :
- OpenAIRE
- Journal :
- Journal of Solid State Chemistry
- Accession number :
- edsair.doi...........0f2c24d5fb0a67354698ba5cc9b07d1c