IRON OXIDE NANO MAGNETIC PARTICLE POWDER, METHOD FOR PRODUCING THE SAME, IRON OXIDE NANO MAGNETIC PARTICLE THIN FILM COMPRISING THE IRON OXIDE NANO MAGNETIC PARTICLE POWDER, AND METHOD FOR PRODUCING THE SAME

PROBLEM TO BE SOLVED: To provide iron oxide nano magnetic particle powder having the characteristics of ferromagnetism even in the average particle diameter of 15 nm or lower, preferably, 10 nm or lower, a method for producing the same, an iron oxide nano magnetic particle thin film comprising the iron oxide nano magnetic particle powder, and a method for producing the same.SOLUTION: As starting raw material, -FeO(OH)(iron oxide hydroxide)nano fine particles are used, and the (iron oxide hydroxide) nano fine particles are covered with a silicon oxide, and are heat-treated in an ambient air atmosphere to generate iron oxide nano magnetic particles of a -FeOphase as a single phase with the average particle diameter of 15 nm or lower, and further, of 10 nm or lower. Further, an iron oxide nano magnetic particle thin film is obtained using the iron oxide nano magnetic particles. 【課題】平均粒径１５ｎｍ以下、好ましくは１０ｎｍ以下でも強磁性の特性を有する酸化鉄ナノ磁性粒子粉とその製造方法、当該酸化鉄ナノ磁性粒子粉を含む酸化鉄ナノ磁性粒子薄膜とその製造方法を提供する。【解決手段】出発原料として、 −ＦｅＯ（ＯＨ）（酸化水酸化鉄）ナノ微粒子を用い、当該（酸化水酸化鉄）ナノ微粒子をシリコン酸化物で覆って大気雰囲気下で熱処理することで、単相の −Ｆｅ２Ｏ３相であり、平均粒径１５ｎｍ以下、さらには１０ｎｍ以下の酸化鉄ナノ磁性粒子を生成させる。さらに当該酸化鉄ナノ磁性粒子を用いて、酸化鉄ナノ磁性粒子薄膜を得る。【選択図】図１