Manipulation of Exchange Bias Effect via All-Solid-State Li-Ion Redox Capacitor with Antiferromagnetic Electrode

The electric field control of the exchange bias has considerable application scope in modern spintronic devices such as magnetic random-access memories. Herein, we utilize an all-solid-state Li-ion redox capacitor with an antiferromagnetic electrode for reversible control of the exchange bias in a Co/Co3O4 heterostructure. The controlled intercalation and deintercalation of Li ions in the antiferromagnetic Co3O4 anode via galvanostatic charge and discharge enables reversible and nonvolatile control of the exchange bias. The mechanism of exchange-bias control in the Co/Co3O4 heterostructure is studied using various characterization techniques. This work establishes an approach to control the exchange bias in all-solidstate magnetoionics, which is of great practical importance for the development of modern spintronic devices.