Low noise manganese-zinc single crystal ferrite heads

Experiments have been made for the purpose of producing superior magnetic heads in the audio frequency range. Sn substituted Mn-Zn single crystal ferrites are made using the Bridgman method, and under suitable annealing conditions an SnO2phase is precipitated. The precipitation direction of an SnO2phase coincides with the <110> direction of a spinel structure. By using head tip materials of SnO2precipitated Mn-Zn single crystal ferrite, superior magnetic heads, characterized by low noise and high wear resistance, have been obtained.