A5027497164- Magnetic properties of thin films
- Quantum and electron transport phenomena
- Photonic Crystals and Applications
- Magneto-Optical Properties and Applications
- Photonic and Optical Devices
- Heusler alloys: electronic and magnetic properties
- Semiconductor Quantum Structures and Devices
University of Shanghai for Science and Technology
2022-2023
Abstract Although the Co‐based Heusler compounds are predicted to be half‐metals, their sub‐picosecond demagnetization dynamics upon laser excitation show a transition‐metal‐like behavior. Any possible role of ultrafast nonlocal spin transport on half‐metallic has only been inferred indirectly by time‐resolved magneto‐optical Kerr effect. Here, an optically driven current traveling from Co 2 FeSi half metal into adjacent Pt layer using terahertz (THz) emission time‐domain spectroscopy (TDS)...
Due to its high sensitivity and because it does not rely on the magneto-optical response, terahertz (THz) emission spectroscopy has been used as a powerful time-resolved tool for investigating ultrafast demagnetization spin current dynamics in nanometer-thick ferromagnetic (FM)/heavy metal (HM) heterostructures. Here, by changing order of conductive HM coating FM nanometer film, dominant electric dipole contribution laser-induced THz radiation can be unraveled from magnetic dipole....
The dynamic control of magnetization by short laser pulses has recently attracted interest. transient at the metallic magnetic interface been investigated through second-harmonic generation and time-resolved magneto-optical effect. However, ultrafast light-driven nonlinearity in ferromagnetic heterostructures for terahertz (THz) radiation remains unclear. Here, we present THz from a heterostructure, Pt/CoFeB/Ta, which is ascribed to an ∼6–8% contribution magnetization-induced optical...