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. 2022 Jul 28;12(15):2593. doi: 10.3390/nano12152593

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Magnetization-temperature curves measured in zero-field-cooling (ZFC) and field-cooling (FC) mode from representative structures consisting of two HfO₂-Fe₂O₃ double layers (a) and one HfO₂-Fe₂O₃-HfO₂ triple layer (b). The films were grown on diamagnetic SiO₂/Si substrates using cycle sequences represented by labels.