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Direct Evidence of Flexomagnetoelectric Effect Revealed by Single-Molecule Spectroscopy
I S Veshchunov1,2, S V Mironov3, W Magrini1,2,3
1University Bordeaux, LP2N, F-33405 Talence, France.
Physical Review Letters
|July 25, 2015
Summary
Researchers observed electric fields from magnetic variations in iron garnet films. These fields, generated by superconductors, were measured using molecular Stark shifts at low temperatures, confirming theoretical predictions.
Area of Science:
- Condensed matter physics
- Solid-state physics
- Magnetism and superconductivity
Background:
- Magnetization inhomogeneities can generate electric fields.
- Superconductors in intermediate states produce nonuniform magnetic fields.
- The flexomagnetoelectric effect links magnetism and electric fields.
Purpose of the Study:
- To provide direct evidence of electric fields induced by magnetization inhomogeneities.
- To investigate the flexomagnetoelectric effect in iron garnet films.
- To correlate experimental measurements with theoretical predictions.
Main Methods:
- Creating magnetization inhomogeneity using magnetic fields from type-I superconductor domain boundaries.
- Utilizing Stark shifts of single-molecule zero-phonon lines as a probe.
- Performing measurements at liquid helium temperatures.
Main Results:
- Directly observed electric fields induced by magnetization inhomogeneity.
- Measured electric fields align with theoretical estimations.
- Demonstrated the flexomagnetoelectric effect in the studied system.
Conclusions:
- The flexomagnetoelectric effect is experimentally verified.
- Single-molecule spectroscopy is a viable method for probing local electric fields.
- This work advances the understanding of magnetoelectric coupling in materials.
