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← ScienceWhich effect increases when exceeding manganese ferrite's Curie temperature?
A)Loss of spontaneous magnetization✓
B)Increased electrical conductivity
C)Enhanced mechanical hardness
D)Decreased thermal expansion rate
💡 Explanation
Loss of spontaneous magnetization increases when the Curie temperature is exceeded because thermal energy disrupts the Parallel Alignment of Electron Spins causing ferromagnetism to disappear. Therefore, alignment vanishes rather than other properties because alignment dictates magnetism.
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