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RESEARCH PRODUCT
Influence of diamagnetic impurity on mid‐IR absorption in antiferromagnetic insulator NiO
Massimo PiccininiMassimo PiccininiAlexei KuzminM. Cestelli GuidiAugusto MarcelliNina Mironova-ulmanesubject
CrystallographyMaterials scienceImpurityvisual_artThermal decompositionNon-blocking I/Ovisual_art.visual_art_mediumAnalytical chemistryDiamagnetismAntiferromagnetismCrystalliteCeramicSolid solutiondescription
-1 was studied in polycrystalline Ni c Mg 1-c O solid solutions with c=0.99, 0.98, 0.97, 0.95, 0.90, 0.80, 0.70 and 0.60. The composition and temperature dependences of the absorption suggest that the band has magnetic origin re- lated to simultaneous excitation of two-magnons at the Brillouin-zone boundary and one phonon. -1 in polycrystalline NicMg1-cO solid solutions. Polycrystalline solid solutions NicMg1-cO (c=0.99, 0.98, 0.97, 0.95, 0.90, 0.80, 0.70 and 0.60) were prepared using ceramic technology from the appropriate amounts of aqueous solutions of Mg(NO3)2·6H2O and Ni(NO3)2·6H2O salts, which were mixed and slowly evaporated. The remaining dry 'flakes' were heated up to 500-600 oC to remove NO2 completely. The obtained polycrystalline solid solutions were pressed and annealed during 100 hours at 1200 oC in air and then rapidly cooled down to room temperature. The pure polycrystalline NiO and MgO were obtained using the same method by thermal decomposition of the above mentioned salts. These NicMg1-cO solid solutions have greenish
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-01-01 | physica status solidi (c) |