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用倾斜样品X-射线衍射学(STD)和饱和磁化强度测量,研究了960MeV氩离子低温(195K)辐照多晶钇铁柘榴石Y_3Fe_5O_(12)(YIG)所引起的非晶化过程。分析结果表明,960MeV氩离子引起YIG晶态→非晶态转变是一个逐步的过程,在这个过程中电子能损起主导作用,但也需要一定的辐照剂量。并在辐照剂量0≥1×10~(14)Ar/cm~2时,在电子能损S_e=8.3MeV处,首次观察到了几乎完全的非晶态。
The amorphization induced by polycrystalline yttrium iron garnet Y_3Fe_5O_ (12) (YIG) irradiated by 960MeV argon ions at a low temperature (195K) was studied by oblique sample X-ray diffraction (STD) and saturation magnetization measurements. The results show that 960MeV argon ions cause YIG crystal → amorphous state transition is a gradual process in which electrons can play a leading role, but also require a certain amount of radiation dose. At the irradiation dose of 0 ≥1 × 10 ~ (14) Ar / cm ~ 2, almost complete amorphous state was observed for the first time at the electron loss of S_e = 8.3MeV.