Electromagnon signatures of a metastable multiferroic state
arXiv:2502.10309 · doi:10.1103/PhysRevLett.134.086706
Abstract
Magnetoelectric multiferroic materials, particularly type-II multiferroics where ferroelectric polarizations arise from magnetic order, offer significant potential for the simultaneous control of magnetic and electric properties. However, it remains an open question as to how the multiferroic ground states are stabilized on the free-energy landscape in the presence of intricate competition between the magnetoelectric coupling and thermal fluctuations. In this work, by using terahertz time-domain spectroscopy in combination with an applied magnetic field, photoexcitation, and single-shot detection, we reveal the spectroscopic signatures of a magnetic-field-induced metastable multiferroic state in a hexaferrite. This state remains robust until thermal influences cause the sample to revert to the original paraelectric state. Our findings shed light on the emergence of metastable multiferroicity and its interplay with thermal dynamics.
References in corpus (13)
- Spin current and magneto-electric effect in non-collinear magnets
- Ferroelectricity in spiral magnets
- Possible evidence for electromagnons in multiferroic manganites
- Evidence for a single-layer van der Waals multiferroic
- Dynamical magneto-electric coupling in helical magnets
- Electric field control of nonvolatile four-state magnetization at room temperature
- A New Multiferroic Material: MnWO4
- Terahertz field-induced nonlinear coupling of two magnon modes in an antiferromagnet
- Terahertz field-driven magnon upconversion in an antiferromagnet
- Gigantic terahertz magnetochromism via electromagnons in hexaferrite magnet BaMgFeO
- Snapshots of a light-induced metastable hidden phase driven by the collapse of charge order
- Non-equilibrium dynamics of spin-lattice coupling
- Optical-pump terahertz-probe spectroscopy in high magnetic fields with kHz single-shot detection