1
Ryo Murakami: Powder for permanent magnet, method for its production and anisotropic permanent magnet made using said powder. Santoku Metal, Marshall Gerstein & Borun, December 11, 2001: US06328817 (3 worldwide citation)

There is provided a powder for permanent magnet comprising needle-like fine particles of Fe or Fe—Co alloy as a base material, a hard magnetic layer and a separation layer of an oxide of rare earth element provided outside said hard magnetic layer.


2
Murakami Ryo: Powder for permanent magnet, method for its production and anisotropic permanent magnet made using said powder. Santoku Metal, August 25, 1999: EP0938105-A1

There is provided a powder for permanent magnet comprising needle-like fine particles of Fe or Fe-Co alloy as a base material, a hard magnetic layer containing Fe, Sm and N provided on the surface of said needle-like fine particles, and a separation layer of an oxide of rare earth element provided o ...


3
Murakami Ryo: Powder for permanent magnet, method for its production and anisotropic permanent magnet made using said powder. Santoku Metal, Murakami Ryo, SUMIDA Yoshihiro, May 14, 1998: WO/1998/020507

A base material is needle-like fine particles of Fe or an Fe alloy containing Co. A hard magnetic layer containing Fe, Sm and N is provided on the surface of the needle-like fine particles and a separation layer made of an oxide of a rare earth element is provided outside the hard magnetic layer.