Ordre et desordre de repartition des cations metalliques dans le nouveau systeme ; comportement verre de spin
| Autor: | Annie Leblanc, P. Colombet, Zeineddine Ouili |
|---|---|
| Rok vydání: | 1985 |
| Předmět: |
Chemistry
Mechanical Engineering chemistry.chemical_element Mineralogy Crystal structure Condensed Matter Physics Magnetic susceptibility law.invention Chromium Crystallography Mechanics of Materials law General Materials Science Lamellar structure Orthorhombic crystal system Electron paramagnetic resonance Indium Monoclinic crystal system |
| Zdroj: | Materials Research Bulletin. 20:947-954 |
| ISSN: | 0025-5408 |
| Popis: | The Ag 1 2 Cr ( 1 2 − x ) In x PS 3 (0 ⩽ x ⩽ 1 2 ) lamellar system was prepared at 700°C from the elements, except for In which was introduced through In2S3. From powder spectra analysis, it is shown that the crystal symmetry is monoclinic, space group P 2 a , for the lower x values, and orthorhombic, space group P21221, for the higher x values. A two-phase domain ranges from x ⋍ 0.20 to x ⋍ 0.35 . The magnetic susceptibility was measured from 4 to 300 K for samples belonging to the two types of phases, and an EPR study at X band was carried out from 77 to 500 K as well. The magnetic properties are discussed as a fonction of the nature of the diluted chromium (III) sub-lattice. In particular, for the monoclinic phase, a spin-glass behavior in a 1D magnetic framework is observed, in agreement with a previous preliminary study performed on a 2% indium containing compound. |
| Databáze: | OpenAIRE |
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