New and Improved High Energy Magnets
Abstract
Fe16N2, SmCo(7-x)Zr(x), RCo(13-x)Si(x), and RFe(13-x)Si(x) (R is a rare earth) have been studied as high temperature, high performance permanent magnet materials. Each of them systems has the intrinsic properties needed: (1) large magnetization, (2) high T sub c, and (3) uniaxial structure. However, the latter features are found only for certain values in RCo(13-x)Si(x) and RFe(13-x)Si(x). In no case, with the possible exception of SmCo(7-x)Zr(x), have all three of the desired intrinsic properties been present in a single compound. Fe-57 NMR work on Fe16N2 confirms that the Fe moment is significantly enhanced compared to the moment of elemental Fe. SmCo(7-x)Zr(x) has intrinsic properties which make it deserve attention as a high energy permanent magnet material. LaCo13 has large magnetization and high T sub c. Unfortunately, it is cubic and hence lacks anisotropy. It can be made uniaxial but then it loses its large Ms and T sub c. It has been studied as a soft magnet material in regard to which it shows promise.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1998
- Accession Number
- ADA344379
Entities
People
- M. Q. Huang
- W. E. Wallace
Organizations
- Carnegie Mellon University