Using antiferromagnetic/ferromagnetic bilayers as detection layers in magnetic tunnel junctions

Grégory Malinowski (1) , Michel Hehn (1) , Mohammed Sajieddine (1) , François Montaigne (1) , Eric Jouguelet (1) , F. Canet (1) , M. Alnot (1) , D Lacour (1) , Alain Schuhl (1)

1 LPM - Laboratoire de physique des matériaux

It is shown that the association of an antiferromagnetic material with a ferromagnetic material in an exchange-coupled bilayer, often used in spintronic devices as a magnetic reference or pinned system, can be used as a detection layer in magnetoresistive sensors. The magnetic response is shown to be reversible and linear in an adjustable field window. The sensitivity is studied as a function of temperature.

Domaines: Matière Condensée [cond-mat]

Grégory Malinowski, Michel Hehn, Mohammed Sajieddine, François Montaigne, Eric Jouguelet, et al.. Using antiferromagnetic/ferromagnetic bilayers as detection layers in magnetic tunnel junctions. Applied Physics Letters, 2003, 83 (21), pp.4372-4374. ⟨10.1063/1.1630171⟩. ⟨hal-02949319⟩