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Updated: Aug 1, 2025
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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
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Composite Spin Hall Conductivity from Non-Collinear Antiferromagnetic Order
Steve Novakov1, Peter B Meisenheimer2, Grace A Pan3
1Department of Physics, University of Michigan, Ann Arbor, MI, 48109, USA.
Advanced Materials (Deerfield Beach, Fla.)
|April 30, 2023
Summary
Non-collinear antiferromagnets enable novel spin Hall effects, offering higher spin torque efficiencies than conventional materials. Their unique magnetic lattice symmetry allows for tunable spin polarization in next-generation spintronic devices.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Spintronics
Background:
- Non-collinear antiferromagnets (AFMs) present a new frontier for intrinsic spin Hall effects (SHEs).
- Unlike conventional materials, AFMs allow for unique spin current polarizations and orientation-dependent anisotropies due to their magnetic lattice symmetry.
- Understanding these phenomena is crucial for advancing spintronic technologies.
Purpose of the Study:
- To investigate and report multi-component out-of-plane spin Hall conductivities in L12-ordered antiferromagnetic PtMn3 thin films.
- To demonstrate the predicted orientation-dependent anisotropy of spin Hall conductivities in the non-collinear state.
- To explore the potential of symmetry control in AFMs for tailored magnetoelectronic functionalities.
Main Methods:
- Fabrication of L12-ordered PtMn3 thin films.
- Experimental measurement of spin Hall conductivities and spin torque efficiencies.
- Analysis of magnetic lattice symmetry effects on spin transport.
Main Results:
- Observation of multi-component out-of-plane spin Hall conductivities uniquely generated in the non-collinear state of PtMn3.
- Achieved significantly higher spin torque efficiencies (ξ ≈ 0.3) compared to conventional materials like Pt (ξ ≈ 0.1).
- Demonstrated orientation-dependent anisotropy in spin Hall conductivities, confirming theoretical predictions.
Conclusions:
- Non-collinear antiferromagnets, specifically PtMn3, are promising platforms for efficient intrinsic spin Hall effects.
- The magnetic lattice symmetry offers a powerful tool for controlling and tailoring spin polarization.
- This research opens avenues for developing novel spintronic devices with selectable spin functionalities.
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