Diamagnetism
| Formula / Notation | χ_m < 0 (negative susceptibility); repelled by magnetic field |
|---|---|
| Also Known As | Diamagnetic property, negative magnetic susceptibility, paired-electron magnetism |
What is Diamagnetism?
A form of magnetism in which a material is weakly repelled by an external magnetic field. It arises from paired electrons whose magnetic moments cancel out. All substances have diamagnetic contributions, but diamagnetism is only observed when no unpaired electrons are present.
Formula & Notation
Other Names / Synonyms: Diamagnetic property, negative magnetic susceptibility, paired-electron magnetism
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
A form of magnetism in which a material is weakly repelled by an external magnetic field. It arises from paired electrons whose magnetic moments cancel out. All substances have diamagnetic contributions, but diamagnetism is only observed when no unpaired electrons are present.
Diamagnetism is exploited in magnetic levitation of diamagnetic materials (pyrolytic graphite, bismuth). In NMR spectroscopy, diamagnetic anisotropy of ring systems (aromatic ring current effects) causes characteristic chemical shift patterns. Diamagnetic susceptibility data is used to check electro…
Exposure to strong magnetic fields (MRI, NMR magnets) is generally safe for most people, but magnetic field forces on implanted ferromagnetic objects (pacemakers, metal fragments) can be hazardous. Cryogenic coolants (liquid He, N₂) for superconducting magnets present asphyxiation and cryogenic burn…
The formula or notation for Diamagnetism is: χ_m < 0 (negative susceptibility); repelled by magnetic field