Magnetism modulation of Fe/ZnO heterostructure by interface oxidation

Wen Chin Lin, Po Chun Chang, Cheng Jui Tsai, Tsung Chun Hsieh, Fang Yuh Lo

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Abstract

In this study, the magnetic coercivity (Hc) of Fe/ZnO heterostructure was significantly enhanced by 2-3 times after applying a suitable current. This Hc enhancement originates from the Fe-oxidation at the Fe/ZnO interface induced by direct current heating. Depth-profiling X-ray photoemission spectroscopy analysis confirmed the formation of FeO, Fe3O4, and Fe2O3 close to the interface region, depending on the Fe thickness and annealing process. This study demonstrates that direct current heating can moderately change the local interface oxidation and modulate the magnetic properties. These results clearly reveal the correlation between magnetism and interface properties in the Fe/ZnO heterostructure and provide valuable information for future applications.

Original languageEnglish
Article number212405
JournalApplied Physics Letters
Volume103
Issue number21
DOIs
Publication statusPublished - 2013 Nov 18

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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