## Abstract A study of the crystallographic and magnetic structures of the oxides Sr~2~MReO~6~ (M = Ni, Co, Zn) was carried out on polycrystalline samples by using neutron powder diffraction (NPD) data. At room temperature the perovskite crystal structure is tetragonal, space group __I__4/__m__, an
Magnetic susceptibility and specific heat of uranium double perovskite oxides Ba2MUO6 (M=Co, Ni)
✍ Scribed by Yukio Hinatsu; Yoshihiro Doi
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 243 KB
- Volume
- 179
- Category
- Article
- ISSN
- 0022-4596
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We have investigated a series of double-perovskite oxides Sr 2 MMoO 6 À d (M ¼ Mg, Mn, Fe, Co, Ni, Zn) for redox stability, oxygen content and crystal structure. Phases with M ¼Co, Ni and Zn were found to be oxygen-stoichiometric and stable under oxidizing conditions, whereas those with M¼ Mn and Fe
The hexagonal perovskite-type oxides A x BO 3 (A ؍ Ca, Sr, Ba; B ؍ Co, Ni) consist of (BO 3 ) chains made up of face-sharing BO 6 octahedra and BO 6 trigonal prisms. On the basis of molecular orbital calculations for their structural building blocks we examined why the transition metal atoms in