The synthesis, structure, and physical properties of \(\mathrm{La}_{3-x}\) \(M_{x} \mathrm{Ni}_{2} \mathrm{O}_{7-\delta}\), with \(M=\mathrm{Ca}^{2+}, \mathrm{Sr}^{2+}\), or \(\mathrm{Ba}^{2+}\), and \(0<x \leq 0.075\), were investigated. These compounds were prepared by a precursor method with tetr
Structural characterization and electronic properties of A-substituted LaNi0.8M0.2O3 (A = Ca, Sr; M = Te, W) perovskites
β Scribed by I. Alvarez; M.L. Veiga; C. Pico
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 504 KB
- Volume
- 93
- Category
- Article
- ISSN
- 0167-2738
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β¦ Synopsis
The synthesis. structural characterization and electronic propertics of the A, ,La. Electrical resistivity measurements show semiconductor behavior in all cases (E,, < 0.2 eV). Ferromagnetic interactions with Curie temperatures ranging between 180 and 250 K are detected from susceptibility mcasuremcnts.
π SIMILAR VOLUMES
Single-phase samples of LaBa 2 Fe 3 O 8Ψw with Ψ0.204w4 0.83 were synthesized, characterized by oxygen-content analyses, powder X-ray diffraction, and magnetic susceptibility, and investigated using 57 Fe Mo] ssbauer spectroscopy. At 296 K, antiferromagnetic ordering of the Fe sites was observed for