• Jeol-backed joint study published in Acta Materialia on 2026/08/07, led by Shimane University, targeting irradiation-driven weakening in ferritic steels.
• In situ TEM tracked screw dislocations hitting nanoscale ⟨100⟩ loops in high-purity α-iron at 840 K, 300 K.
• Loop resistance to dislocation glide rose at 840 K, challenging the standard assumption that obstacle strength falls with temperature.
• Room-temperature imaging used JEOL’s JEM-Z200MF magnetic field-free TEM, designed to enable real-time work on ferromagnetic iron.

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