Exchange Bias in the [CoO/Co/Pd]10 Antidot Large Area Arrays

Abstract

Magnetic nanostructures revealing exchange bias effect have gained a lot of interest in recent years due to their possible applications in modern devices with various functionalities. In this paper, we present our studies on patterned [CoO/Co/Pd]10 multilayer where ferromagnetic material is in a form of clusters, instead of being a continuous layer. The system was patterned using nanosphere lithography technique which resulted in creation of an assembly of well-ordered antidots or islands over a large substrate area. We found that the overall hysteresis loop of the films consists of hard and soft components. The hard component hysteresis loop exhibits a large exchange bias field up to -11 kOe. The patterning process causes a slight increase of the exchange field as the antidot radius rises. We also found that the material on edges of the structures gives rise to a soft unbiased magnetization component.

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References in corpus (5)

• Wide range and tunable linear TMR sensor using two exchange pinned electrodes
• Modelling exchange bias in core/shell nanoparticles
• Ordered FePdCu nanoisland arrays made by templated solid-state dewetting
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Cited by in corpus (2)

• Magnetization Reversal Mechanism in Exchange-Biased Spring-like Thin-Film Composite
• Observation of Exchange Bias in Antiferromagnetic Cr${}_{0.79}$Se due to the Coexistence of Itinerant Weak Ferromagnetism at Low-temperatures