Ferromagnetism
| Also Known As | Ferromagnetic behavior, permanent magnetism, domain magnetism |
|---|
What is Ferromagnetism?
Ferromagnetism is a phenomenon by which certain materials (iron, nickel, cobalt, and their alloys) become permanently magnetized in the presence of a magnetic field and retain their magnetism after the field is removed. It arises from the alignment of magnetic dipole moments of atoms within magnetic domains. Above the Curie temperature, ferromagnetic materials become paramagnetic.
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Ferromagnetism is a phenomenon by which certain materials (iron, nickel, cobalt, and their alloys) become permanently magnetized in the presence of a magnetic field and retain their magnetism after the field is removed. It arises from the alignment of magnetic dipole moments of atoms within magnetic domains. Above the Curie temperature, ferromagnetic materials become paramagnetic.
Permanent magnets (motors, generators, speakers). Magnetic data storage (hard drives, tapes). Transformers and inductors. Magnetic resonance imaging (MRI). Compasses. Electromagnetic cranes. Magnetic shielding.
Strong magnets can attract ferromagnetic objects suddenly — injury hazard. Pacemakers and electronic devices may malfunction near strong magnets. High-temperature applications near Curie point require monitoring. Magnetized materials may affect sensitive instruments.