“…The magnetic and structural properties of haematite are also affected by particle size [7,8], degree of crystallinity [9], pressure [10], doping [2][3][4][5][6], and mechanical alloying [11] due to its technological applications. It is noticed that depending upon milling conditions, structural phase transformations of nanostructured haematite to maghemite, magnetite and wüstite can be induced.…”