Magnetic Meta-Materials for Electromagnetic Applications

摘要

The most significant achievements of the project are (1) Development of R2Fe14B-based (nano)composite permanent magnets with maximum energy product (BH)m>50 MGOe, (2) Improvement of the magnetic properties of the existing Sm2Co17-type magnets with (BH)m close to their theoretical limit and with higher operating temperatures, up to 500 deg C, (3) Development of new (nano)composite permanent magnets based on a hard magnetic phase (e.g., 2:17,1:5) and a soft magnetic phase (Fe-based), (4) Development of new hybrid permanent magnets based on two hard magnetic phases (combinations between2:14:1, 2:17 and 1:5), (5) Development of soft magnetic (nano)composites for high temperature (Fe-Co/W) and high frequency (artificial ferrites) applications. The obtained results encompassed the fabrication of new materials with outstanding, enhanced characteristics, as well as the theoretical description and understanding of their magnetic properties. New effects have been also put in evidence and opened up new perspectives in the understanding of the magnetic coupling and hardening mechanism.