Title:
MAGNETIC SENSOR
Document Type and Number:
WIPO Patent Application WO1998035240
Kind Code:
A3
Abstract:
Magnetic sensors having a ferromagnetic layer structure wherein said layers are interchangeably coupled by means of non-magnetic metal intermediate layers, are used in modern storage technology to read magnetically stored information. If reading is to be precise, accuracy in determining modifiable magnetic resistance should be very high. Accuracy in known magnetic sensors is influenced by intermediate layers of a given constant thickness. Optimization is no longer possible after production. Furthermore, the use of known magnetic sensor is restricted to field sensing. The magnetic resistance of the inventive magnetic sensor can be continuously and reversibly modified and optimized by charging hydrogen on the intermediate layers which consist of Nb exhibiting an affinity with hydrogen or a Cr alloy exhibiting an affinity with hydrogen and having a layer thickness in the core area ranging from 1.3 nm to 1.6 nm. THe inventive sensor can used as a magnetic sensor, specially in comprehensive areas of magnetically-stored information processing, as well as a hydrogen sensor, and can be used to detect totally differing physical measurement variables.
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Inventors:
KLOSE FRANK (DE)
MALETTA HANSJOERG (DE)
NAGENGAST DIETER (DE)
REHM CHRISTINE (DE)
WEIDINGER ALOIS (DE)
MALETTA HANSJOERG (DE)
NAGENGAST DIETER (DE)
REHM CHRISTINE (DE)
WEIDINGER ALOIS (DE)
Application Number:
PCT/DE1998/000316
Publication Date:
November 19, 1998
Filing Date:
February 06, 1998
Export Citation:
Assignee:
HAHN MEITNER KERNFORSCH (DE)
KLOSE FRANK (DE)
MALETTA HANSJOERG (DE)
NAGENGAST DIETER (DE)
REHM CHRISTINE (DE)
WEIDINGER ALOIS (DE)
KLOSE FRANK (DE)
MALETTA HANSJOERG (DE)
NAGENGAST DIETER (DE)
REHM CHRISTINE (DE)
WEIDINGER ALOIS (DE)
International Classes:
G01R33/09; G11C11/15; H01L43/10; (IPC1-7): G01R33/09
Other References:
KLOSE F ET AL: "Continuous and reversible change of the magnetic coupling in an Fe/Nb multilayer induced by hydrogen charging", PHYSICAL REVIEW LETTERS, 10 FEB. 1997, APS, USA, vol. 78, no. 6, 10 February 1997 (1997-02-10), ISSN 0031-9007, pages 1150 - 1153, XP002073001
NAGENGAST ET AL.: "Hydrogen-induced change of the magnetic coupling in Nb/Fe multilayers", INTERNATIONAL SYMPOSIUM ON METAL-HYDROGEN SYSTEMS-FUNDAMENTALS AND APPLICATIONS, 25 August 1996 (1996-08-25) - 30 August 1996 (1996-08-30), LES DIABLERETS, SWITZERLAND, XP002073002
WEIDINGER A ET AL: "Metallic multilayers and hydrogen", THIN SOLID FILMS, vol. 275, no. 1, 1 April 1996 (1996-04-01), pages 48-53, XP004006920
NAGENGAST ET AL.: "Hydrogen-induced change of the magnetic coupling in Nb/Fe multilayers", INTERNATIONAL SYMPOSIUM ON METAL-HYDROGEN SYSTEMS-FUNDAMENTALS AND APPLICATIONS, 25 August 1996 (1996-08-25) - 30 August 1996 (1996-08-30), LES DIABLERETS, SWITZERLAND, XP002073002
WEIDINGER A ET AL: "Metallic multilayers and hydrogen", THIN SOLID FILMS, vol. 275, no. 1, 1 April 1996 (1996-04-01), pages 48-53, XP004006920
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