Approximating Field of Permanent Magnet with Micro-Currents?

  • I
  • Thread starter tade
  • Start date
  • #1
552
18
According to theory, the magnetic field of a permanent magnet is due to the combined effects of billions of microscopic magnetic moments.

I'm trying to use the Biot -Savart Law for billions of microscopic currents to approximate a the field of a permanent magnet.

How should these currents (or circuits) be arranged in space?
 

Answers and Replies

  • #2
ZapperZ
Staff Emeritus
Science Advisor
Education Advisor
Insights Author
35,847
4,676
According to theory, the magnetic field of a permanent magnet is due to the combined effects of billions of microscopic magnetic moments.

I'm trying to use the Biot -Savart Law for billions of microscopic currents to approximate a the field of a permanent magnet.

How should these currents (or circuits) be arranged in space?

How do you think those magnetic dipoles should be arranged in the first place? What do you think will happen to the bulk magnetization if these dipoles are randomly oriented?

BTW, who is torturing you to do such a silly thing?

Zz.
 
  • #3
552
18
How do you think those magnetic dipoles should be arranged in the first place? What do you think will happen to the bulk magnetization if these dipoles are randomly oriented?

BTW, who is torturing you to do such a silly thing?

Zz.
It is just out of curiosity.


I was thinking of arranging them like the cans in this picture:

energy%20drink%20overload.jpg


Imagine that the rim of each can represents one circular circuit/current loop. Then we can stack layer upon layer of cans.
 
  • #4
ZapperZ
Staff Emeritus
Science Advisor
Education Advisor
Insights Author
35,847
4,676
It is just out of curiosity.


I was thinking of arranging them like the cans in this picture:

energy%20drink%20overload.jpg


Imagine that the rim of each can represents one circular circuit/current loop. Then we can stack layer upon layer of cans.

Then I'd love to see how you will handle the summing up of the "infinite series" off-axis solution from each of these current loop.

Zz.
 
  • #5
552
18
Then I'd love to see how you will handle the summing up of the "infinite series" off-axis solution from each of these current loop.

Zz.
Umm, thanks for the... encouragement?
 
  • #6
552
18
Then I'd love to see how you will handle the summing up of the "infinite series" off-axis solution from each of these current loop.

Would you like to give me some pointer/suggestions/changes to this simplistic model?
 

Related Threads on Approximating Field of Permanent Magnet with Micro-Currents?

Replies
1
Views
17K
Replies
23
Views
496
Replies
27
Views
2K
  • Last Post
Replies
6
Views
16K
  • Last Post
Replies
2
Views
2K
Top