Supplementary Material II

Figure SII: (a) TEM bright-field image of Fe3O4 region. The Fe3O4 grain that was followed during the experiment at RT had been pointed by the red arrow. (b and c) NBDP acquired for the Fe3O4 grain highlighted in (a) acquired at (b) 0 dpa RT and (c) 2 dpa irradiation with 1 MeV Kr ions at RT. No loss of 1rst order reflection is evidenced in the NBDP at 2 dpa.