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Large-scale multiferroic complex oxide epitaxy with magnetically switched polarization enabled by solution

Cong Liu¹, Feng An^1,2, Paria S M Gharavi³

¹Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518005, China.

National Science Review

|October 25, 2021

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Summary

This summary is machine-generated.

Researchers developed solution-based epitaxy for multiferroic (1-x)BiTi(1-Fe)Mg(1-O3-(x)CaTiO3 (BTFM-CTO) films. This enables tunable, large-area complex oxide films with room-temperature magnetoelectric coupling for industrial applications.

Area of Science:

Materials Science
Solid-State Physics
Nanotechnology

Background:

Complex oxides exhibit tunable properties but achieving high-quality epitaxy with controlled composition remains challenging.
Developing scalable methods for complex oxide epitaxy is crucial for advanced material applications.

Purpose of the Study:

To develop a solution-based single-crystalline epitaxy method for multiferroic BTFM-CTO solid solutions.
To investigate the ferroelectric and magnetoelectric properties of the synthesized BTFM-CTO films.
To demonstrate the potential for large-scale industrial applications of complex oxide epitaxy.

Main Methods:

Solution-based single-crystalline epitaxy was employed to grow BTFM-CTO films.
Atomic-scale characterization confirmed ferroelectricity and spontaneous polarization.

Keywords:

complex oxide epitaxy multiferroic solution method

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Compositional tuning was performed to achieve bulk magnetization and magnetoelectric coupling.

Main Results:

Successfully developed large-area, single-crystalline epitaxial BTFM-CTO films.
Confirmed ferroelectricity at the atomic scale with strong spontaneous polarization.
Achieved room-temperature bulk magnetization and significant magnetoelectric coupling (2.7-3.0 × 10^-7 s/m).

Conclusions:

Solution processing is a viable method for large-scale complex oxide epitaxy.
Novel room-temperature magnetoelectric coupling was established in epitaxial BTFM-CTO films.
The developed method allows exploration of a wide range of compositions, phases, and structures for industrial scalability.