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Multiferroicity in plastically deformed SrTiO3
Xi Wang1,2, Anirban Kundu3, Bochao Xu4
1Department of Physics, Bar-Ilan University, Ramat Gan, Israel.
Plastic deformation induces robust magnetism and ferroelectricity in quantum paraelectric strontium titanate (SrTiO3). This creates a novel quantum multiferroic material, controllable with stress and electric fields.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Materials
Background:
- Quantum materials exhibit unique electronic states upon manipulation.
- Plastic deformation introduces dislocations, potentially creating new physical phenomena.
- This approach is underexplored in quantum materials research.
Purpose of the Study:
- To investigate the effects of plastic deformation on quantum paraelectric strontium titanate (SrTiO3).
- To explore the potential for inducing novel electronic states, specifically magnetism, through plastic deformation.
Main Methods:
- Plastic deformation of SrTiO3 crystals.
- Scanning magnetic measurements.
- Near-field optical microscopy.
Main Results:
- Plastic deformation induced robust magnetism in SrTiO3, absent in the pristine material.
- Magnetic order was localized along dislocation walls, coexisting with ferroelectricity.
- Magnetic signals were switchable via external stress and tunable with electric fields.
Conclusions:
- Plastically deformed SrTiO3 exhibits robust quantum multiferroic properties.
- Plastic deformation is a viable method for manipulating quantum material properties.
- This work opens new avenues for engineering quantum phenomena in materials.
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