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|Title:||Ultrafine magnetic cyanide particles|
|Source:||Ng, C.W.,Ding, J.,Chow, P.Y.,Gan, L.M.,Quek, C.H. (2000-05-01). Ultrafine magnetic cyanide particles. Journal of Applied Physics 87 (9 III) : 6049-6051. ScholarBank@NUS Repository.|
|Abstract:||Cobalt- and nickel-iron hexacyanide powders were synthesized by the microemulsion method using CoCl2 or NiCl2 and K3FeIII (CN)6. The resultant powders K0.2Co1.4[Fe(CN)6].6.5H2O and K0.8Ni1.1[Fe(CN)6].4.5H2O were single phase with a mean particle size in the range of 5-10 nm. Curie temperatures of the cobalt- and nickel-iron cyanide powders were estimated to be 14 and 28 K, respectively, using Curie-Weiss law. The coercivity was measured to be 1.8 kOe for nanoscaled Co-Fe cyanide particles. High coercivity of 4.0 kOe was achieved in the coprecipitated Ni-Fe cyanide powder. Superparamagnetic behavior was observed in the microemulsion-derived Ni-Fe cyanide particles. It has been found that a heat treatment at 150°C led to a presence of a soft magnetic phase and a strong reduction of magnetic anisotropy. © 2000 American Institute of Physics.|
|Source Title:||Journal of Applied Physics|
|Appears in Collections:||Staff Publications|
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