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## Main Question or Discussion Point

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

- Thread starter Petar Mali
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- #1

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

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Can I say for [tex]\sigma=0[/tex], [tex]T=T_N[/tex]?

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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.Can I say for [tex]\sigma=0[/tex], [tex]T=T_N[/tex]?

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Sigma iz magnetisation!

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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.

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