Accession Number : ADA180553

Title :   Studies of Materials Having Significance for the Production of High Energy Magnets.

Descriptive Note : Final rept. 1 Feb 84-31 Jan 87,

Corporate Author : CARNEGIE-MELLON UNIV PITTSBURGH PA

Personal Author(s) : Wallace,W. E.

Report Date : 03 APR 1987

Pagination or Media Count : 12

Abstract : Magnetic properties (saturation magnetizations, Curie temperatures and anisotropy fields of a number of rare earth-transition metal systems are reported. Systems studied fall into five categories: (1) 1:5 and 2:17 compounds, (2) R2T14B, where R is rare earth and T is a 3d transition metal, (3) borides related to R2Fe14B, (4) intermetallic hydrides and (5) miscellaneous alloys. The work has revealed a number of interesting features of these systems: (a) when R in RCo5 systems is partially replaced by Ti, Zr or Hf, T sub c is sharply incremented; (b) PrCo8Fe9 has a theoretical (BH) sub max of 68 MGOe; (c) the R2T14B systems exhibit the same magnetic coupling systematics as the binary RT sub x systems; (d) the R2Fe14B systems exhibit the same magnetic coupling systematic structures - conical, axial and planar anisotropy; (e) the RCo4B systems have small or negative anisotrophy and hence are unsuitable for magnetic fabrication; (f) hydrogenation weakens the uniaxial anisotrophy in R2Fe14B systems. Keywords: High energy magnetics; Rare earth alloys; Rare earth iron borides.

Descriptors :   *MAGNETS, *HIGH ENERGY, *ANISOTROPY, COUPLING(INTERACTION), CURIE TEMPERATURE, FABRICATION, BORIDES, HYDROGENATION, IRON COMPOUNDS, MAGNETIC FIELDS, MAGNETIC MATERIALS, MAGNETIC PROPERTIES, ALLOYS, MATERIALS, METALS, PLANAR STRUCTURES, PRODUCTION, RARE EARTH ALLOYS, RARE EARTH COMPOUNDS, RARE EARTH ELEMENTS, STRUCTURES, TEMPERATURE, TRANSITION METAL COMPOUNDS

Subject Categories : Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE