Hitachi Metals, Ltd.

Neomax Co., Ltd.

Ryosuke Kogure

Satoshi Hirosawa

Takeshi Nishiuchi

Hirokazu Kanekiyo

Hiroyuki Tomizawa

A method of making a magnetic alloy material includes the steps of: preparing a melt of an alloy material having a predetermined composition; rapidly cooling and solidifying the melt to obtain a rapidly solidified alloy represented by: FeREATMwhere RE is at least one rare-earth element selected from La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er and Tm and including at least about 90 at % of La; A is at least one element selected from Al, Si, Ga, Ge and Sn; TM is at least one transition metal element selected from Sc, Ti, V, Cr, Mn, Co, Ni, Cu and Zn; and 5 at %&#x2266;a&#x2266;10 at %, 4.7 at %&#x2266;b&#x2266;18 at % and 0 at %&#x2266;c&#x2266;9 at %; and producing a compound phase having an NaZn-type crystal structure in at least about 70 vol % of the rapidly solidified alloy.

Magnetic alloy material and method of making the magnetic alloy material

A magnetic alloy material according to the present invention has a composition represented by FeREACo, where RE is a rare-earth element always including La, A is either Si or Al, 6 at %&#x2266;a&#x2266;11 at %, 8 at %&#x2266;b&#x2266;18 at %, and 0 at %&#x2266;c&#x2266;9 at %, and has either a two phase structure consisting essentially of an &#x3b1;-Fe phase and an (RE, Fe, A) phase including 30 at % to 90 at % of RE or a three phase structure consisting essentially of the &#x3b1;-Fe phase, the (RE, Fe, A) phase including 30 at % to 90 at % of RE and an RE(Fe, A)compound phase with an NaZn-type crystal structure. The respective phases have an average minor-axis size of 40 nm to 2 &#x3bc;m.

Growing community of inventors

Mishima-gun, Japan

Ryosuke Kogure