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GMR [6 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2022-03-18

English

Subject field(s)
  • Electronic Devices
  • Semiconductors (Electronics)
  • Electromagnetism
CONT

Some Heusler alloys ... are known to possess half metallic [property] substances that act as conductors to electrons of only one spin orientation when their atoms are in an orderly arrangement. In previous research, a high-quality GMR device was fabricated using half-metallic Heusler alloys. This device was reported to exhibit an extremely large magnetoresistance ratio, a characteristic vital to the development of hard disk [drives].

Key term(s)
  • giant magneto-resistive device
  • giant magneto-resistance device

French

Domaine(s)
  • Dispositifs électroniques
  • Semi-conducteurs (Électronique)
  • Électromagnétisme
CONT

Les dispositifs à MRG sont encore aujourd'hui les composantes de choix pour les têtes de lecture des disques durs modernes.

Key term(s)
  • dispositif à magnéto-résistance géante

Spanish

Save record 1

Record 2 2021-11-30

English

Subject field(s)
  • Physics
  • Magnetism and Electromagnetism
  • Electronics
DEF

... the large change in the electrical resistance which is induced by the application of a magnetic field to thin films composed of alternating ferromagnetic and nonmagnetic layers.

Key term(s)
  • giant magneto-resistance
  • giant magneto-resistance effect

French

Domaine(s)
  • Physique
  • Magnétisme et électromagnétisme
  • Électronique
DEF

[...] effet quantique observé dans les structures de films minces composées d'une alternance de couches ferromagnétiques et de couches non magnétiques [...]

Key term(s)
  • magnéto-résistance géante

Spanish

Campo(s) temático(s)
  • Física
  • Magnetismo y electromagnetismo
  • Electrónica
CONT

El efecto de la magnetorresistencia gigante se descubrió en 1988 y su importancia se puso de manifiesto rápidamente, pues a mediados de los '90 las cabezas lectoras de IBM ya se basaban en ello. En esencia, este efecto permite que puedas leer la información magnética almacenada en el disco o soporte magnético con mayor precisión y sensibilidad, con lo cual se pueden fabricar unidades magnéticas más pequeñas, y por tanto posibilita aumentar la densidad de grabación.

Save record 2

Record 3 2017-10-26

English

Subject field(s)
  • Surveillance, Detection and Reconnaissance (Military)
  • Land Forces
DEF

A set of activities conducted by land operations forces that assist the commander in defining and shaping the battlespace.

OBS

ground manoeuvre reconnaissance; GMR: term, abbreviation and definition officially approved by the Army Terminology Panel.

French

Domaine(s)
  • Surveillance, détection et reconnaissance (Militaire)
  • Forces terrestres
DEF

Ensemble d'activités menées par des forces d'opérations terrestres pour aider le commandant à définir et à façonner l'espace de bataille.

OBS

reconnaissance des forces de manœuvre terrestres; RFMT : terme, abréviation et définition uniformisés par le Groupe d'experts en terminologie de l'Armée de terre.

Spanish

Save record 3

Record 4 2010-03-01

English

Subject field(s)
  • Computer Memories
  • Electromagnetism
  • Electromagnetic Radiation
CONT

GMR is based on the spin-dependent scattering of electrons travelling across metallic thin films. In its most basic realization, a GMR device consists of two thin magnetic metal films, separated by a non-magnetic metal. If the magnetic layers have a different magnetic orientation with respect to each other, the electrons scatter strongly in the trilayer structure and the electrical resistance is high. However, once the magnetic orientation of the magnetic layers is aligned using an external magnetic field, electrons with spins antiparallel to that direction scatter much less, and move more easily between the magnetic and non-magnetic layers - hence, the electrical resistance is low.

French

Domaine(s)
  • Mémoires (Informatique)
  • Électromagnétisme
  • Rayonnements électromagnétiques
CONT

Application : les dispositifs en couches minces à magnétorésistance géante. Les têtes de lecture de nombreux dispositifs de stockage de masse (disques durs) utilisent la magnétorésistance géante (GMR : Giant magnetoresistance) : l'orientation magnétique de la couche libre de la tête de lecture est influencée par l'état du disque dur sous-jacent, la résistance électrique du dispositif dépend de l'orientation relative des aimantations des couches magnétiques [...]

Spanish

Save record 4

Record 5 2003-08-21

English

Subject field(s)
  • National and International Security
  • General Conduct of Military Operations

French

Domaine(s)
  • Sécurité nationale et internationale
  • Conduite générale des opérations militaires

Spanish

Save record 5

Record 6 2003-03-10

English

Subject field(s)
  • Federal Government Bodies and Committees (Canadian)
  • Economic Co-operation and Development
  • International Relations
OBS

Department of Foreign Affairs and International Trade, Middle East and North Africa Bureau.

French

Domaine(s)
  • Organismes et comités fédéraux (Gouvernement canadien)
  • Coopération et développement économiques
  • Relations internationales
OBS

Ministère des Affaires étrangères et du Commerce international, Direction générale du Moyen-Orient et de l'Afrique du Nord.

Spanish

Save record 6

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