MAT Collaboration Meeting 2026

The radiation-induced monoclinic-to-tetragonal phase transition in ZrO2 and HfO2 has been the subject of many investigations, but the transformation pathways and underlying structural mechanisms are still not well understood. In this study, microcrystalline powder samples of ZrO2 and HfO2 were irradiated with 946 MeV and 1470 MeV Au ions to a wide fluence range up to 3 × 1013 ions/cm2. To...

The recent discovery of irradiation-induced self-organized formation of the β/γ-Ga₂O₃ double-polymorph structure has revealed new opportunities to study ion-beam-driven phase transformations in radiation-tolerant semiconductors. While most previous studies considered nuclear (Sₙ) and electronic (Sₑ) energy deposition as largely independent, their coupled effects and the resulting...

Metallic glasses are ideal model systems for studying vitreous solids, yet linking atomic structure and its evolution in the potential energy landscape to mechanical properties remains a fundamental challenge. While structural rejuvenation is known to increase the Gibbs free energy and modify plastic deformation behavior, its microscopic origin, particularly the roles of medium-range order...

To induce material modification, including ion track formation, under high-energy ion irradiation in the electronic stopping regime, the electronic stopping power (S_e) is one of the important parameters. Since Se increases with ion energy at low energies and then decreases at high energies, it exhibits a maximum whose value becomes larger for heavier ions. Therefore, among monatomic ions, the...