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← ScienceWhich phenomenon impedes miniaturization of ferromagnetic hard drives?
A)Superparamagnetism overcomes bit anisotropy.✓
B)Increased magnetoelastic damping occurs.
C)Giant magnetoresistance gets weakened.
D)Domain wall depinning gets amplified.
💡 Explanation
Superparamagnetism limits hard drive miniaturization because as the ferromagnetic domains reduce in size due to smaller particles, thermal energy overcomes magnetic anisotropy, therefore stored data gets randomized rather than retaining directionally aligned magnetic domains under Curie’s law.
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