公开(公告)号：DE69104671T2

公开(公告)日：1995-05-04

申请号：DE69104671

申请日：1991-08-02

Applicant: IBM

Inventor： ANDRICACOS PANAYOTIS CONSTANTI ,  CHANG JEI-WEI ,  PETEK BOJAN ,  ROMANKIW LUBOMYR

IPC: G11B5/127 ,  G11B5/187 ,  G11B5/31 ,  G11B5/39 ,  H01F10/32 ,  H01F10/08 ,  G11B5/33

Abstract: A magnetic thin film structure comprising a first layer (12) of magnetic material having a low anisotropy Hk magnetically coupled to a second layer (14) magnetic material having a high anisotropy Hk and a low coercivity. The laminate provides a dual anisotropy behavior such that the laminate exhibits a high initial permeability at relatively small applied fields during the read operation and a high anisotropy at high applied fields during the write operation. The laminate of the present invention reduces inductive head domain instability produced by the write operation while maintaining high reproducing sensitivity during the read operation. Use of the higher Hk material also reduces the sensitivity of the head performance to variation in process-induced stresses.

公开(公告)号：DE69104671D1

公开(公告)日：1994-11-24

申请号：DE69104671

申请日：1991-08-02

Applicant: IBM

Inventor： ANDRICACOS PANAYOTIS CONSTANTI ,  CHANG JEI-WEI ,  PETEK BOJAN ,  ROMANKIW LUBOMYR

IPC: G11B5/127 ,  G11B5/187 ,  G11B5/31 ,  G11B5/39 ,  H01F10/32 ,  H01F10/08 ,  G11B5/33

Abstract: A magnetic thin film structure comprising a first layer (12) of magnetic material having a low anisotropy Hk magnetically coupled to a second layer (14) magnetic material having a high anisotropy Hk and a low coercivity. The laminate provides a dual anisotropy behavior such that the laminate exhibits a high initial permeability at relatively small applied fields during the read operation and a high anisotropy at high applied fields during the write operation. The laminate of the present invention reduces inductive head domain instability produced by the write operation while maintaining high reproducing sensitivity during the read operation. Use of the higher Hk material also reduces the sensitivity of the head performance to variation in process-induced stresses.

公开(公告)号：DE69115847T2

公开(公告)日：1996-07-11

申请号：DE69115847

申请日：1991-10-14

Applicant: IBM

Inventor： CLABES JOACHIM G ,  HATZAKIS MICHAEL ,  LEE KAM L ,  PETEK BOJAN ,  SLONCZEWSKI JOHN C

IPC: G01B7/34 ,  B81B1/00 ,  G01B7/00 ,  G01B21/30 ,  G01N37/00 ,  G01Q60/54 ,  G01Q70/12 ,  G01R1/067 ,  G01R1/07 ,  H01J37/28 ,  G01N27/00 ,  G01R31/315

公开(公告)号：DE69115847D1

公开(公告)日：1996-02-08

申请号：DE69115847

申请日：1991-10-14

Applicant: IBM

Inventor： CLABES JOACHIM G ,  HATZAKIS MICHAEL ,  LEE KAM L ,  PETEK BOJAN ,  SLONCZEWSKI JOHN C

IPC: G01B7/34 ,  B81B1/00 ,  G01B7/00 ,  G01B21/30 ,  G01N37/00 ,  G01Q60/54 ,  G01Q70/12 ,  G01R1/067 ,  G01R1/07 ,  H01J37/28 ,  G01N27/00 ,  G01R31/315