Preparation and physical properties of CuAl1-xMnxO2 (0 < x < 0.2) delafossites

The formation of a CuAl1-xMnxO2 solid solution for a limited range of x values (0 < or = x < or = 0.2) is demonstrated. The samples were synthesized by solid state reactions in silica sealed tubes. They crystallize with the 3R delafossite structure (space group R3m). Magnetic studies show that...

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Veröffentlicht in:	Solid state sciences 2007-03, Vol.9 (3-4), p.236-239
Hauptverfasser:	TÖPFER, Jörg, TRARI, Mohamed, DOUMERC, Jean-Pierre
Format:	Artikel
Sprache:	eng
Schlagworte:	Chemical Sciences Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Exact sciences and technology Magnetic properties and materials Material chemistry Physics Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.) Structure of solids and liquids crystallography Structure of specific crystalline solids
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Zusammenfassung:	The formation of a CuAl1-xMnxO2 solid solution for a limited range of x values (0 < or = x < or = 0.2) is demonstrated. The samples were synthesized by solid state reactions in silica sealed tubes. They crystallize with the 3R delafossite structure (space group R3m). Magnetic studies show that Mn3+ ions are in the HS state and that the predominant interactions are antiferromagnetic. The oxides are semiconductors with an activation energy decreasing with x.
ISSN:	1293-2558 1873-3085
DOI:	10.1016/j.solidstatesciences.2007.01.005