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Figure 1: The ideal magnetic hysteresis loop of an exchange spring magnet (dashed), as well as the hysteresis loops of its isolated hard (Blue) and soft (Red) components. H is the applied external magnetic field, M is the total magnetic flux density of the material.
An exchange spring magnet is a magnetic material with high coercivity and high saturation properties derived from the exchange interaction between a hard magnetic material and a soft magnetic material, respectively.
Coehoorn et al. were the first able to observe an actual exchange spring magnet.[1] Exchange spring magnets are cheaper than many magnets containing rare earth/transition metals (RE-TM Magnets), as the hard phase of the magnet (which commonly comprises RE-TM material) can be less than 15% of the overall magnet by volume.[2]
^Coehoorn, R.; de Mooij, D.B.; De Waard, C. (1989). "Meltspun permanent magnet materials containing Fe3B as the main phase". Journal of Magnetism and Magnetic Materials. 80 (1): 101–104. Bibcode:1989JMMM...80..101C. doi:10.1016/0304-8853(89)90333-8.
^Cite error: The named reference :0 was invoked but never defined (see the help page).
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