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Theses

Transport dépendant du spin et couplage d'échange : de la jonction tunnel au capteur magnétique intégré

Abstract : In a first part, the crystalline and magnetic properties of X/IrMn and X/IrMn/Y multilayers (X,Y= Co and/or Py) are studied. The magnetic properties are explained by the use of micromagnetic models. The exchange coupling difference for both interfaces X/IrMn and IrMn/Y is independent of the microstructure and is shown to be only linked to the stacking order. It is evidenced that depositing an antiferromagnetic layer on a ferromagnetic layer is completely different than the opposite case. In a second part, the IrMn/Co bilayer is used as a detection layer in a magnetic tunnel junction to build up a magnetic field sensor. The sensor output signal is linear and reversible in a field range +/-50 Oe. A clever choice of the junction parameters allowed us to make a temperature independent sensor sensitivity. On this basis, a demonstrator using this magnetic field sensor was realized with its complete electronic processing.
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https://hal.univ-lorraine.fr/tel-01746756
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Submitted on : Thursday, March 29, 2018 - 10:44:16 AM
Last modification on : Wednesday, November 25, 2020 - 3:34:19 AM

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  • HAL Id : tel-01746756, version 1

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Grégory Malinowski. Transport dépendant du spin et couplage d'échange : de la jonction tunnel au capteur magnétique intégré. Autre. Université Henri Poincaré - Nancy 1, 2004. Français. ⟨NNT : 2004NAN10176⟩. ⟨tel-01746756⟩

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