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Tunable physical properties in Bi-based layered supercell multiferroics embedded with Au nanoparticles
Jianan Shen1, Zihao He2, Di Zhang1
1School of Materials Engineering, Purdue University West Lafayette Indiana 47907 USA hwang00@purdue.edu.
Nanoscale Advances
|September 22, 2022
Summary
This study introduces a novel multiferroic nanocomposite with gold nanoparticles, demonstrating tunable properties for advanced spintronic devices. The optimized 6.82 nm gold nanoparticles enhance ferroelectric, ferromagnetic, and plasmonic functionalities for optical switching applications.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Multiferroic materials combine ferroelectric and ferromagnetic/antiferromagnetic properties for device applications like spintronics.
- Coupling multiferroics with plasmonic nanostructures enables optical switching capabilities.
Purpose of the Study:
- To develop a novel nanocomposite system using a multiferroic matrix and plasmonic gold nanoparticles.
- To investigate the tunability of nanoparticle morphology and its impact on nanocomposite properties.
- To explore the potential for optically switchable spintronics and memory devices.
Main Methods:
- Synthesis of a layered Bi1.25AlMnO3.25 (BAMO) multiferroic matrix.
- Incorporation and dispersion of plasmonic gold nanoparticles (Au NPs) within the BAMO matrix.
- Tuning of Au NP size (6.82 nm to 31.59 nm) and characterization of nanocomposite properties.
Main Results:
- Successfully created a BAMO-Au nanocomposite with tunable Au NP morphology.
- Identified optimal ferroelectric, ferromagnetic, and plasmonic properties at 6.82 nm Au NP size.
- Demonstrated room temperature multiferroic properties, localized surface plasmon resonance (LSPR), visible-region hyperbolicity, and magneto-optical coupling.
Conclusions:
- The BAMO-Au nanocomposite system exhibits tunable multiferroic, plasmonic, and magneto-optical functionalities.
- Morphology tuning of Au NPs is key to tailoring nanocomposite properties for specific applications.
- This research validates the coupling of multiferroic oxides with plasmonic metals for advanced optical switching devices.
