Abstract
In this study, the magnetic coercivity (Hc) of Fe/ZnO heterostructure monotonically decreased as voltage was applied. The reversibility of this effect was demonstrated by cyclically changing the bias voltage from 0 to 6–9 V; the Hc decreased 15%–20%. The Hc value exhibited the same variation whether the applied voltage was positive or negative. As thick Fe-oxide gradually formed at the interface by using direct current heating, the Hc increased and the Fe/ZnO heterostructure demonstrated a similar voltage-induced reduction of Hc.
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