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← ScienceWhich outcome occurs when exceeding the Curie temperature limit of a ferromagnetic write head material?
A)Irreversible demagnetization occurs✓
B)Magnetostriction increases linearity
C)Hysteresis loop area expands
D)Increased domain wall mobility
💡 Explanation
Irreversible demagnetization is a consequence of exceeding the Curie temperature in a ferromagnetic material because thermal energy overcomes exchange interactions, resulting in the loss of spontaneous magnetization. Therefore, the head demagnetizes, rather than merely changing magnetostriction under lower driving currents.
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