Neel temperature

  • Thread starter Petar Mali
  • Start date
  • #1
290
0

Main Question or Discussion Point

One question? Neel temperature is temperature in which magnetisation is equal to zero?
 

Answers and Replies

  • #2
199
0
It is the temperature in which the staggered magnetization (= a measure on how much nearest neighbors tend to align oppositely) is nonzero. The magnetization is both zero for a paramagnet and an antiferromagnet.
 
  • #3
290
0
Can I say for [tex]\sigma=0[/tex], [tex]T=T_N[/tex]?
 
  • #4
199
0
Can I say for [tex]\sigma=0[/tex], [tex]T=T_N[/tex]?
What do you mean by sigma=0? If you mean that the entropy is zero, I don't think so. It holds when all the local moments are 'fully' aligned(such that two nearest neighbors point in opposite directions). At the Neel temperature, such alignment starts to develop.
 
  • #5
290
0
Sigma iz magnetisation!
 
  • #6
199
0
Aha! The magnetization! :) In zero fields, the magnetization in the paramagnet-antiferromagnet transition should be always zero. It is not a suitable measure to characterize the transition.
 
Last edited:
Top