Commissariat a L'energie Atomique

Silmag

Jean Mouchot

Jean-Marc Fedeli

Jean-Pierre Lazzari

Bernard Dieny

Bernard Rodmacq

Line Vieux-Rochaz

Marie-Helene Vaudaine

Franck Boileau

Patrick Mas

Philippe Gerard

Andre Pierrot

Multilayer magnetic transducer and structure and process for the production of the structure. The magnetic structure only has one stack of layers of a magnetic material separated by layers of a non-magnetic metallic material having a thickness such that there is an anti-ferromagnetic coupling between the magnetic layers, the magnetic material being chosen from among the alloys FeNi, FeNiCo, and NiCo and the non-magnetic material is silver.

Multilayer magnetic transducer and structure having a high

A magnetoresistive component and transducer for use therewith. The magnetoresistive component has a multilayer-type magnetoresistive strip bent in accordance with a repeated geometrical pattern (7a,7b). The pattern has at least one series of substantially parallel sections (7a,7b) for reducing the demagnetizing fields. The magnetoresistive strip (2) is formed from a stack (13) of magnetic metallic material layers (14) separated by non-magnetic metallic material layers (15). The magnetoresistive component is applicable to a transducer for reading information recorded in magnetic form or for detecting weak magnetic fields.

Magnetoresistive component having a multilayer strip with a geometrical

A magnetic read head having a multilayer magnetoresistant element and a concentrator, and a method of production the magnetic read head. The magnetic head includes a multilayer magnetoresistant element across a head gap of the concentrator positioned to the rear of pole pieces defining the gap of the head. Such a magnetic head may find particular application to magnetic recording.

Magnetic read head having a multilayer magnetoresistant element and a

Current sensor comprising a magnetoresistive tape and its production

A process of producing a magnetic read head which includes a multilayer magnetoresistant element and a concentrator. The magnetic read head is produced to include a multilayer magnetoresistant element across a head gap of the concentrator positioned to a rear of pole pieces defining the gap of the head. Such a magnetic head may find particular application in magnetic recording systems.

Process of producing a magnetic read head having a multilayer

A self-bias sensor including a current source, a resistance measuring device and a sensor element sensitive to a magnetic field to be measured. The sensor element receives from the current source a current which creates a self-biasing field. The sensor element includes a first ferromagnetic layer having a magnetization direction which is sensitive to the magnetic field and when not subject to the magnetic field, and is oriented by the self-biasing field in a direction perpendicular to a longitudinal direction of the sensor element; a second ferromagnetic layer disposed between a first and second conductive layer, where the second ferromagnetic layer has a magnetization which is blocked and directed in the longitudinal direction; and a third ferromagnetic layer which is disposed on the second conductive layer and has a magnetization direction which is sensitive to the magnetic field and, when not subject to the magnetic field, is oriented by the self-biasing field in a second direction perpendicular to the longitudinal direction and substantially of an opposite sense to the magnetization of the first ferromagnetic layer.

Self biased multilayer magnetoresistance sensor

Magnetic flux guide having tongues and magnetoresistive transducer incorporating said guide. A transducer is provided which includes a magnetic flux guide having first and second parts longitudinally separated by a head gap and a magnetoresistive bar positioned facing and along the head gap. The first and second guide parts are provided on their edges contiguous with the head gap respectively with a first and second series of tongues separated by spacers. The tongues of the first part extend into the spaces of the second part and vice versa.

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Grenoble, France

Jean Mouchot