公开(公告)号：JPH06223336A

公开(公告)日：1994-08-12

申请号：JP27514193

申请日：1993-11-04

Applicant: IBM

Inventor： PEETAA MIHAERU BAUMUGARUTO ,  BERUNAARU DEIENI ,  BURUUSU ARUBUIN GAANII ,  JIYAN PIEERU NOJIEERU ,  BUAAJIRU SAIMON SUPERIOSU ,  DENISU RICHIYAADO UIRUHOITO

IPC: G11B5/39 ,  H01L43/08

Abstract: PURPOSE: To provide a magnetic resistance sensor in which conductive electrons scattered in any direction can be used. CONSTITUTION: A magnetic resistance reading sensor having a multilayer double spin valve constitution is provided, based on a spin valve effect. The reading element of this sensor includes first, second, and third ferromagnetic layers 31, 35, and 39 mutually separated by anti-ferromagnetic metallic layers 33 and 37. The magnetizing directions of the first and third ferromagnetic layers 31 and 39, that is, the outside layers of this structure are fixed. The middle second ferromagnetic layer 35 is soft magnetic one, and when an applied magnetic field is absent, the magnetizing direction is vertical to the magnetizing directions of both the outside ferromagnetic layers. In one preferred embodiment, the magnetizing directions of the two outside ferromagnetic layers are mutually fixed in parallel by the switched connection with the adjacent anti-ferromagnetic layers.

公开(公告)号：JPH06203340A

公开(公告)日：1994-07-22

申请号：JP28307193

申请日：1993-11-12

Applicant: IBM

Inventor： UIRIAMU CHIYAARUZU KEIN ,  BERUNAARU DEIENI ,  ROBAATO EDOWAADO FUONTANA JIYU ,  BUAAJIRU SAIMON SUPERIOSU

IPC: G01R33/09 ,  G11B5/02 ,  G11B5/39 ,  H01L43/08 ,  G01R33/06

Abstract: PURPOSE: To considerably increase the sensitivity of a sensor by permitting magnetization in two ferromagnetic layers to respond to applied magnetic signals and providing an MR sensor supplying a measurement signal reinforced by the magnetic signals. CONSTITUTION: One slider 13 is positioned on a disk 12 and respective sliders 13 support plural magnetic read/write converters 21. When the disk 12 rotates, the slider 13 operates inwards and outwards in the direction of a radius on a disk surface 22. A head 21 can access to various parts where desired data are recorded on the disk 12. The respective sliders 13 are fitted to actuator arms 19 by a suspending device 15. The suspending device 15 generates slight spring force and the sliders 13 are pressed on the disk surface 22 by the force. The respective actuator arms 19 are fitted to an actuator means 27 and a coil which can move in a fixed magnetic field is provided for a voice coil motor 18. The moving direction and speed of the coil are controlled by a motor radio wave signal.