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Dual-Ion Based Magneto-ionic Effects in Nanoporous Pd75Co25 Alloy
Stefan Eber1, Georg Haberfehlner2, Peter Banzer3
1Institute of Materials Physics, Graz University of Technology, NAWI Graz, Petersgasse 16, 8010 Graz, Austria.
ACS Materials Au
|May 18, 2026
Summary
Magneto-ionics in Pd-Co alloys offers energy-efficient magnetic control. This study reveals two voltage-induced effects: one from oxide reduction and another from hydrogen interaction, enabling tunable magnetic properties.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Electrochemistry
Background:
- Magneto-ionics enables voltage-controlled magnetic properties.
- Previous work focused on oxygen species in cobalt.
- New approaches are needed for advanced magnetic materials.
Purpose of the Study:
- To investigate magneto-ionic effects in Pd-Co alloys.
- To explore voltage-induced switching using hydrogen and oxygen species.
- To demonstrate tunable magnetic properties in nanoporous Pd-Co.
Main Methods:
- Fabrication of nanoporous Pd75Co25 alloy via dealloying.
- Electrochemical characterization of magnetic switching.
- Analysis of voltage-induced changes in magnetization.
Main Results:
- Demonstrated two distinct magneto-ionic effects in Pd-Co alloys.
- Achieved ferromagnetic ON state from reduced cobalt oxides.
- Observed a faster, hydrogen-induced increase in magnetization.
Conclusions:
- Pd-Co alloys exhibit dual magneto-ionic effects based on oxygen and hydrogen.
- Nanoporous structure facilitates rapid magnetic switching.
- Alloy composition tuning offers adaptable magneto-ionic responses.
Keywords:
dealloyingelectrochemistrymagnetic materialsmagnetic propertiesmagneto-ionicsnanoporous materialsMore Related Videos
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