How does magnetism arise in permanent magnets?

Click For Summary

Discussion Overview

The discussion centers on the origins of magnetism in permanent magnets, exploring the underlying mechanisms and contributing factors. Participants examine theoretical explanations, atomic behavior, and the role of magnetic domains.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant suggests that magnetism can be explained through special relativity, particularly focusing on the effects of moving charges and length contraction.
  • Another participant explains that in permanent magnets, the magnetic field arises from the movement of individual electrons around atoms, with specific electron configurations leading to magnetic properties.
  • A different viewpoint mentions the concept of magnetic domains, indicating that the alignment of these domains contributes to the overall magnetic field of the material.
  • Further clarification is provided regarding the alignment of these magnetic domains, referred to as "micro magnets," which compound to create a significant magnetic field.

Areas of Agreement / Disagreement

Participants present multiple perspectives on how magnetism arises in permanent magnets, with no consensus reached on a singular explanation. The discussion remains open to various interpretations and models.

Contextual Notes

Some assumptions regarding the nature of electron movement and domain alignment are not fully explored, and the discussion does not resolve the relationship between these concepts and the overall magnetic behavior of materials.

FredMadison
Messages
47
Reaction score
0
Hi everyone!

As I understand it, magnetism can be explained by special relativity when charges are moving - length contraction in different frames of reference leads to coulomb forces between the charges in these frames.

But how does magnetism in a permanent magnet arise? Are there currents flowing in the metal?
 
Physics news on Phys.org
In a permanent magnet the field comes from the individual electrons moving around the atoms. Materials are magnetic when the electron configuration is such that these individual magnetic moments add up rather than cancel out.
 
I remember it deals with the minute fields (called domains) all lining up in the same direction to compound and create a big magnetic field.
 
Thanks

Yeah, that makes sense. Thanks a lot!

The most important thing I've learned so far in university physics is to think a few steps further. Sometimes you need a little help in doing so. This forum is great
 

Similar threads

  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 24 ·
Replies
24
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 31 ·
2
Replies
31
Views
5K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 23 ·
Replies
23
Views
5K
  • · Replies 20 ·
Replies
20
Views
5K
  • · Replies 3 ·
Replies
3
Views
2K