“…26 Analogously to the particle size, the doping with foreign cations can significantly modify the magnetic properties of ε-Fe 2 O 3 as heavily reported elsewhere in the literature and mentioned briefly above. 24,42,[46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65] As clearly seen from our results for the undoped phase (see Fig. 5a), both ZFC and FC magnetization curves, recorded under an external magnetic field of 100 and 1000 Oe, shows two significant steps, i.e., one at ∼100 K and the other one at ∼140 K. These steps are signatures of a broad magnetic transition, typical of ε-Fe 2 O 3 , indicating a passage from a collinear ferrimagnetic state to a regime with features of an incommensurate magnetic structure.…”