Iron oxide-based ferromagnetic film and method for producing iron oxide-based ferromagnetic film

摘要

The present invention is an iron oxide-based ferromagnetic film containing iron oxide formed on an arbitrary substrate, wherein the content ratio of the ε phase in iron oxide is 70% or more, and the crystallite diameter is 2 nm or more and 100 nm or less. Relates to an iron oxide ferromagnetic film. In this magnetic film, a target material formed by sintering iron oxide powder having an ε-phase content of 70% or more is irradiated with laser to ablate the iron oxide powder and deposit it on the substrate at high speed. Can be manufactured. The magnetic film according to the present invention is a magnetic film made of a new ferromagnetic material whose main component is a metal material other than a noble metal.