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← ScienceWhich risk increases when annealing a ferromagnetic alloy?
A)Reduced magnetostriction coefficient develops
B)Increased magnetic domain size occurs✓
C)Reduced Curie temperature forms
D)Increased coercivity happens
💡 Explanation
Larger domain sizes increase because grain growth via Ostwald ripening lowers internal stress, favouring larger stable domains. Therefore domain wall motion becomes easier, rather than coercivity increases due to pinning at defects.
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