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Updated: Aug 12, 2025

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides
Published on: May 29, 2018
Significantly Enhanced Room-Temperature Ferromagnetism in Multiferroic EuFeO3-δ Thin Films
Hao Li1, Yali Yang2,3, Shiqing Deng1,3,4
1Beijing Advanced Innovation Center for Materials Genome Engineering and Department of Physical Chemistry, University of Science and Technology Beijing, Beijing100083, China.
Oxygen defect engineering significantly enhances room-temperature ferromagnetism in rare-earth ferrites like EuFeO3. This strategy boosts magnetic properties for spintronic device applications.
Area of Science:
- Materials Science
- Condensed Matter Physics
Background:
- Multiferroics are key for spintronic devices, but many exhibit weak room-temperature magnetism.
- Rare-earth ferrites are promising single-phase multiferroics requiring enhanced magnetic properties.
Purpose of the Study:
- To boost the room-temperature ferromagnetism of the ferrite EuFeO3.
- To investigate the mechanism behind magnetic enhancement through oxygen defect engineering.
Main Methods:
- Oxygen defect engineering of EuFeO3.
- Polarized neutron reflectometry and magnetometry.
- Annular bright-field imaging and theoretical assessment.
Main Results:
- Achieved a 5-fold increase in saturation magnetization (0.04 μB/Fe) in EuFeO3.
- Identified oxygen vacancies (VO) as strengthening magnetic interactions and tilting Fe spins.
- Established a correlation between magnetism and oxygen vacancy concentration/configuration.
Conclusions:
- Oxygen defect engineering is an effective strategy to enhance the magnetic properties of functional oxide materials.
- The findings provide a pathway for developing advanced multiferroics for spintronic applications.
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