The invention relates to bioactive compounds derived from an endophytic Aspergillus sp. Unnecessary layers remaining after alloying or silicidation reaction are then removed by performing planarization processing, e. In various embodiments, the first wireless communication system can be a long-term evolution system and the second wireless communication system can be a universal mobile telecommunications system. The HAMR or MAMR data writing process commences only after the head protrusion has been increased and stabilized.