Saturated paramagnetic and ferromagnetic

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SUMMARY

The discussion centers on the behavior of a paramagnetic material that saturates its magnetic moment at a magnetic field of 30 T. It is established that while the material exhibits ferromagnetic characteristics under high magnetic fields, it should not be classified as a true ferromagnet due to the absence of a phase boundary. The magnetization curve remains smooth and continuous in the saturated paramagnetic state, indicating that for electronic structure calculations, the distinction between paramagnetic and ferromagnetic alignment may not significantly impact the results.

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jackychenp
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Dear All,

I have a paramagnetic material, its magnetic moment will saturate at magnetic field of 30 T (all spins align in the field direction). So shall I treat the high field phase as a ferromagnetic phase when I do electronic calculations?
 
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Yes, I guess so.

The distinction is that for a "real" ferromagnet, you cross a phase boundary somewhere.

For a saturated paramagnet, the magnetization curve is completely smooth and continuous.

For electronic structure calculations you probably don't care if the moments are aligned because of an external magnetic field (para), or because of an internal exchange field (ferro).
 

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