is every material have their respective temperature that made to lose their magnetic properties?
and also at 910 degree Celsius why pure iron transfer from FCC to again BCC
Dear Gopal,
Here are the Curie temperatures (K) for FE and other materials:
https://en.wikipedia.org/wiki/Curie_temperature
a) the Curie temperature indicates the loss of magnetic order, not necessarily local moments. Withn the Stoner model of metallic ferromagnetism thereare no moments above TC. Nature appears to be more complex, though...
b) the thermodynamic answer to your 2nd question would be that the transition arises because the free energies of the two phases cross each others values as a function of T, the crossing point being the transition temperature... [I can't remember the mechanism, though, sorry]
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