Nanophase hard magnets

http://www.contrib.andrew.cmu.edu/~dl0p/laughlin/pdf/248.pdf

Nano-scale materials development for future magnetic applications

http://www.cwscholz.net/projects/papers/preprint/scholz/cms03/magpar.pdf

Scalable parallel micromagnetic solvers for magnetic nanostructures

RETM5 and RE2TM17 (RE=rare earth, TM=transition metal) permanent magnets are discussed in this review. The scientific and technological considerations which have guided their development are described. Along with a discussion of the various research efforts reported in the literature, they help establish the framework within which most of the work can be integrated and understood. In regard to the RETM5 alloys, the review limits itself to the technologically significant SmCo5 materials; others are discussed minimally, and only to the extent that they contributed to overall magnet development efforts. Likewise, from among the fabrication technologies, the review is limited to those processes which have been demonstrated as capable of producing magnets in bulk useful form. Areas covered in this review include phase diagrams, crystal structures, magnetocrystalline anisotropy, coercivity mechanisms, fabrication technologies, processing‐microstructure‐property interrelationships, and thermal effects related to...

RETM5 and RE2TM17 permanent magnets development

RETM5and RE2TM17permanent magnets development

Microstructure of precipitation hardened cobalt rare earth permanent magnets

The magnetic domain structure and microstructure of several Co-Sm magnet alloys were examined by transmission electron microscopy. This study reveals that the investigated single-phase magnets exhibit a low defect density within the grains. The coercivity is determined by the nucleation of reverse domains at soft magnetic inclusions. Precipitation - hardened magnets contain a fine-scale precipitation structure. From the wavy nature of the domain walls we conclude a strong pinning at the precipitates.

P. Skalicky

Papers

Microstructure of precipitation hardened cobalt rare earth permanent magnets

Lorentz electron microscopy of Co-Sm permanent-magnet materials