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← ScienceWhich outcome results when excessive point-defects accumulate within a crystal?
A)Increased phonon scattering weakens material✓
B)Enhanced electron mobility within lattice
C)Higher critical temperature, superconductivity
D)Uniform spontaneous magnetization increases sharply
💡 Explanation
Increased phonon scattering weakens material because phonon transport is disrupted by accumulating defects; point defects introduce disorder that impedes uniform lattice vibrations, therefore vibrational energy dissipation increases rather than creating more ordered structures or promoting electronic phenomena.
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