Osaka University

Yuji Muraoka

Tomoji Kawai

Hitoshi Tabata

A substrate and a target are disposed within a vacuum chamber, and an oxygen partial pressure within the vacuum chamber is set to 1&times;10 or less. Under this condition, a spinel ferrite thin film selected from the group consisting of compounds represented by the formula AE Fe TM O , where AE represents an alkaline earth metal or an alkali metal, TM represents a transition metal and t falls within a range of between 0.2 and 0.6, and compounds represented by the formula Zn Co Fe O , where x falls within a range of between 0.2 and 0.7, is deposited on the substrate by laser beam deposition. The particular method makes it possible to provide a spinel ferrite thin film realizing a spin glass state under temperatures around or higher than room temperature and capable of controlling the spin state by light.

Growing community of inventors

Minoo, Japan

Yuji Muraoka