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← ScienceWhich mechanism weakens permanent magnets above the Curie temperature?
A)Thermal energy overcomes exchange interaction✓
B)Magnetostriction induces crystal lattice distortion
C)Magnetic domains reach saturation polarization
D)Increased eddy currents dissipate magnetic flux
💡 Explanation
Above the Curie temperature, thermal energy disrupts the Spin alignment because of increased atomic vibrations, weakening the ferromagnetic properties owing to the loss of long-range magnetic order. Therefore, exchange interaction fails, rather than other magnetic phenomena controlling domain behavior.
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