Controlled enhancement or suppression of exchange biasing using impurity $\delta$-layers

Abstract

The effects of inserting impurity $\delta$-layers of various elements into a Co/IrMn exchange biased bilayer, at both the interface, and at given points within the IrMn layer a distance from the interface, has been investigated. Depending on the chemical species of dopant, and its position, we found that the exchange biasing can be either strongly enhanced or suppressed. We show that biasing is enhanced with a dusting of certain magnetic impurities, present at either at the interface or sufficiently far away from the Co/IrMn interface. This illustrates that the final spin structure at the Co/IrMn interface is not only governed by interface structure/roughness but is also mediated by local exchange or anisotropy variations within the bulk of the IrMn.

References in corpus (5)

• Domain State Model for Exchange Bias
• Modeling exchange bias microscopically
• Probing the interface magnetism in the FeMn/NiFe exchange bias system using magnetic second harmonic generation
• Impurity Scattering from $\delta$-layers in Giant Magnetoresistance Systems
• On the mechanism of irradiation enhanced exchange bias

Cited by in corpus (5)

• Tailoring spin wave channels in a reconfigurable artificial spin ice
• Role of interface coupling inhomogeneity in domain evolution in exchange bias
• Spin-orbit-torque MRAM: from uniaxial to unidirectional switching
• Long-ranged magnetic proximity effects in noble metal-doped cobalt probed with spin- dependent tunnelling
• The Multi-Scale Dynamics of All-Optical Exchange Bias Reversal