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Which risk increases during pulsed laser annealing of ferromagnetic films?

A)Curie temperature threshold overshoot
B)Grain boundary pinning reduction
C)Coercivity field gradient reversal
D)Spontaneous magnetic domain nucleation

💡 Explanation

Overshooting the Curie temperature erases ferromagnetic order because thermal energy overcomes exchange interactions, resulting in a paramagnetic state. The mechanism is thermal disordering, therefore exceeding that threshold leads to property degradation rather than other magnetic phenomena at lower temperatures.

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