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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
Giant spin Hall effect in perpendicularly spin-polarized FePt/Au devices
Takeshi Seki1, Yu Hasegawa, Seiji Mitani
1Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan. go-sai@imr.tohoku.ac.jp
Nature Materials
|January 15, 2008
Summary
Researchers demonstrate giant direct and inverse spin Hall effects (SHEs) at room temperature using a novel multi-terminal device. This breakthrough enables efficient spin current manipulation in non-magnetic materials for spintronics.
Area of Science:
- Condensed matter physics
- Materials science
- Spintronics
Background:
- The spin Hall effect (SHE) facilitates converting charge current to spin current and vice versa in non-magnetic materials.
- Realizing a large SHE in a practical device geometry is essential for spintronic applications.
- Existing methods often require complex geometries or specific magnetic field conditions.
Purpose of the Study:
- To present a novel multi-terminal device for detecting giant direct and inverse spin Hall effects (SHEs).
- To achieve unambiguous identification and detection of SHEs at room temperature.
- To explore the potential of this device for future spintronic architectures.
Main Methods:
- Fabrication of a multi-terminal device incorporating a Gold (Au) Hall cross.
- Integration of an Iron-Platinum (FePt) perpendicular magnetic anisotropy (PMA) spin injector.
- Utilizing perpendicularly magnetized FePt for efficient spin injection and detection without an external magnetic field.
Main Results:
- Demonstration of giant direct and inverse spin Hall effects (SHEs) at room temperature.
- Achieved an unprecedentedly large spin Hall resistance of up to 2.9 mΩ.
- Attributed the large SHE to a significant spin Hall angle in Au via skew scattering and efficient spin injection.
Conclusions:
- The developed device enables efficient manipulation of spin currents in non-magnetic materials.
- The findings highlight the potential of Au and FePt in spintronic devices for practical applications.
- This work paves the way for advanced spin-electronic architectures utilizing the spin Hall effect.
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