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← ScienceWhich risk increases when grain orientation shifts under stress in ferromagnetic materials?
A)Reduced magnetoelastic anisotropy field limits✓
B)Increased superparamagnetic blocking temperature
C)Enhanced spin-orbit coupling effectiveness
D)Elevated coercivity impedes magnetic switching
💡 Explanation
Changing grain orientation alters domain alignment because the crystalline structure influences magnetic anisotropy via the magnetoelastic anisotropy field mechanism; therefore, the energy needed to saturate decreases because the domains are easier to rotate away from misalignment, rather than raising thermal stability.
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