To get special properties of BaF nano-particles one of them is magnetite effect, in which conditions we can get this type of nano-particles.Is there any cases where BaF are not ferro magnetic.
Dear Hahla,
The barium ferrite, BaFe12O19 (properly all barium hexaferrite family are ferromagnetic) is always ferromagnetic below the Curie temperature (around 723K) with a very high coercitive field (around 2350Oe) which resists very well the increase of temperature close to the room temperature. Sometimes its formula is written in short as BaFe, it has a ferromagnetic configuration due to the Fe3+ ions whose d5 electrons are in high-spin electronic configuration. This is the most popular material used in magnetic cards and so on.
When you want to obtain them as nanoparticles there is an advantege due that they are insulators with a perovskite structure and therefore their oxidation is not a great problem, their diameter can reach around 20 nm as the minimum size.
Dear Behzad Abasht and Daniel Baldomir , if calcination is done around 800 degree C, but i still dopt if they are ferromagnetic, I used a magnet to check but no remarkable response, what do u think about that.
Thank you for sharing your knowldge
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