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Tunable Strain in Magnetoelectric ZnO Microrod Composite Interfaces.
Stjepan Bozidar Hrkac1, Christian Thorsten Koops1, Madjid Abes1
1Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel , Olshausenstr. 40, 24098 Kiel, Germany.
ACS Applied Materials & Interfaces
|July 5, 2017
Summary
Investigating magnetoelectric microcomposites revealed that intrinsic and magnetic-field-induced strain are influenced by the ZnO microrod diameter. Miniaturization significantly enhances strain fields and magnetic responses in these materials.
Area of Science:
- Materials Science
- Nanotechnology
- Condensed Matter Physics
Background:
- Magnetoelectric composites exhibit strain at coupled components, crucial for material properties.
- Understanding interface strain is key to optimizing magnetoelectric device performance.
Purpose of the Study:
- To investigate coating-induced and magnetic-field-induced strain at the interface of magnetoelectric microcomposites.
- To explore the impact of component diameter on strain behavior and magnetic response.
Main Methods:
- In situ X-ray nanodiffraction experiments were performed.
- Complex magnetoelectric microcomposites of piezoelectric ZnO microrods coated with magnetostrictive (Fe90Co10)78Si12B10 were analyzed.
Main Results:
- Intrinsic strain (10^-4) and magnetic-field-induced strain (10^-5) were measured at the interface.
- A strain relaxation distance of ~5 μm was observed for both strain types.
- Strain values correlated with rod diameter: intrinsic strain increased exponentially, while magnetic-field-induced strain increased linearly with decreasing diameter.
Conclusions:
- Miniaturizing magnetoelectric composites significantly impacts their properties.
- Reduced rod diameter leads to enhanced strain fields and magnetic responses.
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