Two-stage Synergy of Electronic Energy Loss with Defects in LiTaO3 under Ion Irradiation
Materials research letters(2018)
摘要
ABSTRACT Understanding energy dissipation in electronic and atomic subsystems and subsequent defect evolution is a scientific challenge. Separate and combined effects of electronic and nuclear energy deposition in z-cut LiTaO3 have been investigated. Irradiation of pristine LiTaO3 samples with 2 MeV Ta ions leads to amorphization due to atomic displacement damage, described by a disorder accumulation model. While 21 MeV Si ions do not produce significant damage in pristine LiTaO3, introduction of pre-existing defects sensitizes LiTaO3 to the formation of ion tracks from the electronic energy loss by 21 MeV Si ions that induce a synergistic two-stage phase transition process. Impact statement Experimental study shows that the introduction of pre-existing defects prior to high energy irradiation sensitizes LiTaO3 to ion track formation leading to a synergistic two-stage phase transition process. GRAPHICAL ABSTRACT
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关键词
LiTaO3,synergy,electronic energy loss,amorphization,ion tracks
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