Demagnetizing field

  • Thread starter sokrates
  • Start date
  • #1
483
2

Main Question or Discussion Point

Can anybody enlighten me on what demagnetizing field is and how it comes to existence?
 

Answers and Replies

  • #2
clem
Science Advisor
1,308
15
At the end of a bar magnet, H points in the opposite direction to M and B. This is due to the boundary condition on H at the end of a magnet. In many books, this is called a
"demagnetizing field". That is a misnomer, because it is B and not H that acts to polarize the atoms in the iron. Since B near the end of the magnet is 1/2 its value at the middle, there is some tendency for the magnet to lose a bit of its magnetization (M) over time.
 
  • #3
483
2
I'll try to absorb what you said, and then come back.
Thanks for your post
 

Related Threads for: Demagnetizing field

Replies
0
Views
2K
  • Last Post
Replies
12
Views
2K
  • Last Post
Replies
1
Views
19K
Replies
7
Views
11K
Replies
0
Views
929
Top