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3. Ferromagnetic applications
3.1 Permanent magnets – Magnetic circuits
Two main types of ferromagnetic materials can be distinguished: hard ferromagnetics and soft ferromagnetics. Hard ferromagnets have very open hysteresis cycles, with a strong coercive field and high remanence. Soft ferromagnets, on the other hand, have a shallow hysteresis cycle with a low coercive field.
The applications of these two types of ferromagnetic materials are very different . Soft ferromagnetic materials are used in magnetic circuits. They guide magnetic field lines in transformers or electromagnets,...
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Ferromagnetic applications
Using ferromagnets for spintronics
Bibliography
Events
Condensed Matter Day, Grenoble, August 27-31, 2018
( https://jmc2018.sciencesconf.org )
Colloque Louis Néel, May 14-17, 2019, Toulouse
( https://www.sciencesconf.org/browse/conference/?confid=5388...
Patents
More than 4,500 patents exist on MRAMs, including the following:
High speed magneto-resistive random access memory, J.C. Wu, H.L. Stadler, R.R. Katti, US5173873 (1992) ;
Magnetic memory with a thermally assisted writing procedure, J.P. Nozières, I.L.Prejbeanu, TW200937415 (2009) ;
Magnetic memory device, C. Heide,...
Directory
Manufacturers – Suppliers – Distributors (non-exhaustive list)
A number of French manufacturers use nanoscale magnetic materials. These include :
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Crocus Technology (magnetic sensors, MRAMs),
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Hprobe (development...
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