A ferromagnetic material is heated above its Curie temperature $T_C.$ In the absence of another phase transition, it generally behaves as:
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Question

A ferromagnetic material is heated above its Curie temperature T_C. In the absence of another phase transition, it generally behaves as:

G1 Physics · Accepted Answer

Below T_C, exchange interaction produces long-range spontaneous ferromagnetic ordering. Above T_C, thermal agitation becomes strong enough to destroy this long-range order. The atomic moments still exist, but their response is then paramagnetic. Therefore a ferromagnet generally becomes paramagnetic above its Curie temperature.