Nanostructured Nd-Fe-B magnets with enhanced remanence

J. Wecker*, K. Schnitzke, H. Cerva, W. Grogger

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Nanostructured isotropic Nd-Fe-B magnets with enhanced remanence were produced by hot compaction of mechanically alloyed Nd-Fe-B powders at temperatures of about 600°C. Phase formation occurred during hot pressing without significant grain growth. The microstructure is a two phase nanocomposite of hard magnetic Nd2Fe14B and soft magnetic α-Fe with an average grain size of about 20 nm. These small dimensions allow effective exchange interactions between hard and soft magnetic grains and result in an enhancement of the remanence by more than 30% above the Stoner-Wolfarth limit expected for noninteracting single domain particles. So far, the best results are a remanence of 1.0 T, an energy density of 121 kJ/m3, and a coercivity of 4.2 kA/cm for a Nd-Fe-Co-Si-B magnet.

Original languageEnglish
Pages (from-to)563
Number of pages1
JournalApplied Physics Letters
Publication statusPublished - 1995

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


Dive into the research topics of 'Nanostructured Nd-Fe-B magnets with enhanced remanence'. Together they form a unique fingerprint.

Cite this