Supplementary Material I

Figure SI: (a-l) NBDP acquired for a Fe3O4 at (a) the beginning of the experiment at RT (b) upon cooling the sample to 50 K (c) 50 K 0.1 dpa (d) 50 K 0.3 dpa (e) 50 K 0.5 dpa (f) 50 K 0.8 dpa (g) 50 K 1 dpa (h) 50 K 2 dpa (i) 180 K 2 dpa (j) 225 K 2 dpa (k) 255 K 2 dpa (l) RT 2 dpa.