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← ScienceWhich consequence results when thermal fluctuations randomize electron spins?
A)Curie temperature phase transition occurs✓
B)Giant magnetoresistance effect disappears
C)Exchange interaction increases sharply
D)Magnetostriction remains nearly constant
💡 Explanation
Ferromagnetism vanishes above the Curie temperature because thermal agitation overcomes the exchange interaction, causing the spontaneous magnetization to disappear; therefore, the material transitions from ferromagnetic to paramagnetic, rather than retaining its properties.
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