“…There are numerous approaches to prepare hexagonal ferrites, such as phase inversion [6], electroless plating [7], electro spinning [8], template [9], high-energy ball milling [10], co-precipitation [11], hydrothermal [12], aqueous solution [13], micro-emulsion [14], glass-crystallization [15], salt melt methods [16] and sol-gel approaches [17]. As compared to other approaches, the sol-gel method has been confirmed to be an easy and adaptable method to construct hexagonal ferrites [18].…”