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A study of exchange bias effect in Fe3O4/MnO core–shell hetero-nanostructures

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Abstract

Spinel ferrite-based core–shell hetero nanostructures have received a lot of attention in a variety of applications including the development of gas sensors, memory devices, biomedicine, photo catalysts, and electrodes. In this work, we reported Fe3O4/MnO core–shell hetero-nanostructure using a simple one-step hydrothermal process. The Field emission scanning electron microscope and X-ray photoelectron spectroscopy analysis indicate the morphology and oxidation states of Fe, Mn, and O present in nanomaterial with an average cluster size of ⁓580 nm. The results of the bulk magnetic measurements of the prepared core–shell hetero-nanostructure indicate the ferrimagnetic behavior at low temperatures with a blocking temperature of ~ 64 K. The interfacial coupling of synthesized heterostructure was evaluated by the observation of the exchange bias effect under field-cooled protocols, which was demonstrated by a large shifting in magnetization in favor of the positive/negative applied field axis relative to the zero field-cooled magnetization curve.

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Acknowledgements

The authors would like to appreciate the Department of Science and Technology (DST) India, and the University Grant Commission (UGC) for their collaborative work and financial support. S.K. also thanks IIT Guwahati for the X-ray photo electron spectroscopy (XPS) measurements.

Funding

SK thanks the UGC grant. NM appreciates the support of the SERB CRG programme. This work is partially supported by CRG/2019/004056.

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  1. School of Basic Sciences, Indian Institute of Technology, Bhubaneswar, Odisha, 752050, India

    Subodh Khamari, Soumyakanta Panda & Niharika Mohapatra

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  1. Subodh Khamari
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  3. Niharika Mohapatra
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SK and NM were involved in the planning and design of the experimental work. SK prepared the samples, collected the data, and SP performed the magnetic measurement.

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Correspondence to Subodh Khamari or Niharika Mohapatra.

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Khamari, S., Panda, S. & Mohapatra, N. A study of exchange bias effect in Fe3O4/MnO core–shell hetero-nanostructures. J Mater Sci: Mater Electron 35, 286 (2024). https://doi.org/10.1007/s10854-023-11860-2

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