Electrodynamics of photo‐carriers in multiferroic Eu <sub>0.75</sub> Y <sub>0.25</sub> MnO <sub>3</sub>
Understanding and controlling the antiferromagnetic order in multiferroic materials on an ultrafast time scale is a long standing area of interest, due to their potential applications in spintronics and ultrafast magnetoelectric switching. We present an optical pump-terahertz (THz) probe study on multiferroic Eu<sub>0.75</sub>Y<sub>0.25</sub>MnO<sub>3</sub>. The optical pump predominantly excites the d-d transitions of the Mn<sup>3+</sup> ions, and the temporal evolution of the pump-induced transient conductivity is measured with a subsequent THz pulse. Two distinct, temperature-dependent decay times are revealed. The shorter relaxation time corresponds to spin-lattice thermalization, while the longer one is ascribed to electron-hole recombination. A spin-selection rule in the relaxation process is proposed in the magnetic phase. Slight suppression of the electromagnons was observed after the optical pump pulse within the spin-lattice thermalization time scale. These observed fundamental magnetic processes can shed light on ultrafast control of magnetism and photoinduced phase transitions in multiferroics.
Authors
- Rohit P. Prasankumar (ORCID: https://orcid.org/0000-0003-0902-2831)
- Abul K. Azad (ORCID: https://orcid.org/0000-0002-7784-7432)
- Dmitry Yarotski
- Min‐Cheol Lee (ORCID: https://orcid.org/0000-0002-9145-9700)
- Long Yuan (ORCID: https://orcid.org/0000-0001-5591-9311)
- P. F. S. Rosa (ORCID: https://orcid.org/0000-0002-3437-548X)
- Rolando Valdés Aguilar
- S. A. Trugman
- Sang‐Wook Cheong (ORCID: https://orcid.org/0000-0001-9905-6175)
- Nicholas Sirica (ORCID: https://orcid.org/0000-0002-3265-4186)
- Yue Huang (ORCID: https://orcid.org/0000-0002-2326-5605)
- Jian‐Xin Zhu
- Antoinette J. Taylor
Institutions
- Rutgers, The State University of New Jersey (US)
- United States Naval Research Laboratory (US)
- Los Alamos National Laboratory (US)
- Center for Integrated Nanotechnologies (US)
- Intellectual Ventures (United States) (US)
Publication Details
- Journal
- Nanophotonics
- Published
- 2025-02-07
- DOI
- https://doi.org/10.1515/nanoph-2024-0641
- Citations
- 1
- Primary Topic
- Multiferroics and related materials
- Type
- article
- Field-Weighted Citation Impact
- 0.43
Funders
- U.S. Department of Energy
- W. M. Keck Foundation
- Center for Integrated Nanotechnologies
- Office of Science
- National Nuclear Security Administration
- Basic Energy Sciences
- Laboratory Directed Research and Development
- Los Alamos National Laboratory