What causes paramagnetism and diamagnetism

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SUMMARY

Paramagnetism is caused by the presence of unpaired electrons in an atom, which align with an external magnetic field, resulting in attraction. In contrast, diamagnetism occurs due to the paired electrons in an atom, which create opposing magnetic fields that lead to repulsion from an external magnetic field. The phenomenon of diamagnetism is explained through molecular interactions, as highlighted in the recommended lecture from 4:00 to 11:00. Understanding these concepts is essential for grasping the fundamental principles of magnetism in materials.

PREREQUISITES
  • Understanding of electron configurations and their role in magnetism
  • Familiarity with basic principles of magnetism
  • Knowledge of molecular structure and bonding
  • Ability to interpret scientific lectures and diagrams
NEXT STEPS
  • Watch the recommended lecture segment on molecular diamagnetism from 4:00 to 11:00
  • Research the role of unpaired electrons in paramagnetism
  • Explore the mathematical models explaining diamagnetic repulsion
  • Study the applications of paramagnetism and diamagnetism in materials science
USEFUL FOR

Students of physics, materials scientists, and anyone interested in the fundamental principles of magnetism and its applications in various fields.

ColinD
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Paramagnetism: How does having an unpaired electron attract it into a magnetic field. Why not repel? Is there any reason or we just know from experiment?

Diamagnetism: If the electron spins and therefore magnetic fields cancel, what is causing it to repel from a magnetic field? If it is neutral, how is it repelled exactly?

Thanks for any help.
 
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Hello Colin,

As this is a complicated subject to explain I would start with this from min 4:00 to 11:00 Lecture where a bit of molecular diamagnetism is graphically shown.
 

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