铁氧体磁头的高频特性优异,铁芯损耗小,耐磨性能好,正在取代坡莫合金磁头。但铁氧体的最大磁通密度较小,用作金属磁带的录音磁头时,缝隙宽需在3μ以上,难于制成录放兼用磁头。日本赤井电机公司在磁头结构上加以变革,用录音与放音各设专用缝隙的办法,解决了这一兼用问题。其录音缝隙宽为4μ,放音缝隙宽为1μ,两缝隙的间距为1.2mm。 Ferrite head high-frequency characteristics of excellent core loss, good wear resistance, is replacing the permalloy head. However, the maximum ferrite magnetic flux density smaller, as the metal tape recording head, the gap needs to be more than 3μ wide, it is difficult to make both recording and playback heads. Japan’s Akai Electric Corporation in the magnetic head structure to be changed, with the recording and playback of each set of special gap approach to solve this dual-use problems. The recording gap width of 4μ, playback gap width of 1μ, two gap spacing of 1.2mm.