Magnetic properties of R2Fe14B single crystals

Conference · Mon Apr 01 04:00:00 EST 1985 · J. Appl. Phys.; (United States)

OSTI ID:6212170

Koon, N C; Das, B N; Rubinstein, M; Tyson, J

A whole new class of high-performance permanent magnet materials is based on the ternary tetragonal structure R2Fe14B, where R is one of the rare-earth elements. Single crystals of this structure with R = Y, Nd, and Tb have been successfully grown. Y is a nonmagnetic rare-earth substitute, while Nd and Tb couple ferro- and ferrimagnetically, respectively, relative to the iron moment. All three of the compounds have (001) easy axes at room temperature, although the Nd compound exhibits a spin reorientation away from the (001) below about 150 K. Nd2Fe14B has a saturation induction at room temperature of 16.2 kG, which places an upper limit of approximately 65.6 MGOe on the energy product obtainable by magnets based on that material. While Tb2Fe14B exhibits a smaller magnetization because of ferrimagnetic coupling of the rare earths and the iron, it also has an extremely large magnetic anisotropy which is nearly temperature independent between 4.2 and 300 K. 10 references.

• Research Organization: Naval Research Lab., Washington, DC
• OSTI ID: 6212170
• Report Number(s): CONF-841184-
• Conference Information: Journal Name: J. Appl. Phys.; (United States) Journal Volume: 57
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
BORON ALLOYS
COUPLING
CRYSTALS
ELEMENTS
FERRIMAGNETIC MATERIALS
FERROMAGNETIC MATERIALS
INTERMEDIATE COUPLING
IRON ALLOYS
J-J COUPLING
MAGNETIC MATERIALS
MAGNETIC PROPERTIES
MATERIALS
METALS
MONOCRYSTALS
NEODYMIUM ALLOYS
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
RARE EARTHS
TEMPERATURE EFFECTS
TERBIUM
YTTRIUM ALLOYS