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← ScienceWhich outcome occurs when exceeding the Curie temperature in ferromagnetic read head?
A)Loss of aligned magnetic domains✓
B)Increased coercivity of the material
C)Improved spin-polarized electron tunneling
D)Enhanced read signal noise reduction
💡 Explanation
Exceeding the Curie temperature induces loss of aligned domains because thermal fluctuations overcome the exchange interaction that maintains ferromagnetic order, therefore magnetization disappears rather than enhances, producing paramagnetic behavior, not spin polarization or noise improvements.
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