High coercivity of ordered macroporous FePt films synthesized via colloidal templates.

Iskandar, Ferry; Iwaki, Toru; Toda, Toshiyuki; Okuyama, Kikuo · Nano Lett · 2005

basic_science · Level V

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Abstract

The preparation of a three-dimensionally (3D) ordered macroporous iron-platinum (FePt) film derived from monodisperse FePt nanoparticles (approximately 3 nm in diameter) and polystyrene latex particles (254 nm in diameter) is described. The prepared film has a hexagonally ordered porous structure and coercivity up to 10 kOe after annealing at a temperature of 600 degrees C. We also found that size of FePt particles was maintained at around 3 nm, even after annealing at a temperature of 600 degrees C.

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