The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 13, 2018
Filed:
Apr. 24, 2014
The University of Tokyo, Tokyo, JP;
Dowa Electronics Materials Co., Ltd., Tokyo, JP;
Shin-ichi Ohkoshi, Tokyo, JP;
Marie Yoshikiyo, Tokyo, JP;
Asuka Namai, Tokyo, JP;
Hiroko Tokoro, Tokyo, JP;
Waka Tarora, Tokyo, JP;
Takayuki Yoshida, Tokyo, JP;
Manabu Tanaka, Tokyo, JP;
The University of Tokyo, Tokyo, JP;
Dowa Electronics Materials Co., Ltd., Tokyo, JP;
Abstract
There is provided an iron oxide magnetic nanoparticle powder having a ferromagnetic property even if the particles have an average particle size of 15 nm or less, preferably 10 nm or less, and a method of producing the same, an iron oxide magnetic nanoparticle thin film containing the iron oxide magnetic nanoparticle powder and a method of producing the same, wherein the iron oxide magnetic nanoparticles having an ε-FeOsingle phase, having the average particle size of 15 nm or less, and further 10 nm or less, are generated by using β-FeO(OH) (iron oxide hydroxide) nanoparticles as a starting material, and coating the (iron oxide hydroxide) nanoparticles with silicon oxide, and applying heat treatment thereto under an atmospheric air, and further the iron oxide magnetic nanoparticle thin film is obtained by using the iron oxide magnetic nanoparticles.