Magnetic head,申请号US19810304612-传众专利搜索

Magnetic head

申请公布号：US4450494(A)

申请号：US19810304612

申请日期：1981.09.22

申请公布日期：1984.05.22

申请人：

HITACHI LTD.

发明人：FUJIWARA, HIDEO;KUDO, MITSUHIRO;TAMURA, TEIZO;SUGISHITA, NOBUYUKI;SHIROISHI, YOSHIHIRO;KIMURA, TAKESHI;SHINAGAWA, KIMINARI;KUMASAKA, NORIYUKI

分类号：G11B5/127;G11B5/133;G11B5/187;G11B5/193;G11B5/23;G11B5/245;(IPC1-7):G11B5/12;G11B5/22

主分类号：G11B5/127

摘要：A magnetic head having a magnetic core formed by facing a pair of magnetic substances through a working gap at a head section confronting a magnetic recording medium is disclosed in which at least one of the magnetic substances has magnetic anisotropy, and an angle alpha (in a C-shaped core half) and/or an angle alpha ' (in an I-shaped core half) between a core surface confronting the magnetic recording medium and a direction having a maximum magnetic permeability in a main magnetic circuit plane of the magnetic substance having magnetic anisotropy is made larger than an orientation angle of the above direction for making minimum the magnetic reluctance of the main magnetic circuit of the magnetic core by beta (for alpha ) and/or beta ' (for alpha ') to improve the recording/reproducing characteristic of the magnetic head, where beta is given by a formula <IMAGE> is equal to or less than 25 DEG , D indicates a depth of the working gap, L* indicates an effective length of an oblique part for forming the working gap, and min [a, b] indicates the smaller of a and b.