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Electrical switching in a magnetically intercalated transition metal dichalcogenide
Nityan L Nair1,2, Eran Maniv3,4, Caolan John5,6
1Department of Physics, University of California, Berkeley, CA, USA. nairn@berkeley.edu.
Nature Materials
|November 6, 2019
Summary
Researchers demonstrated a new antiferromagnetic switch using Fe1/3NbS2. Low current densities reorient magnetic order, showing potential for fast, robust spintronic devices.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Spintronics
Background:
- Transition metal dichalcogenides exhibit complex correlated behaviors, enabling new frontiers in 2D many-body physics.
- Antiferromagnetic spintronics offers potential for advanced technologies with fast switching, magnetic insensitivity, and reduced crosstalk, but materials integration remains a challenge.
Purpose of the Study:
- To investigate the potential of intercalated transition metal dichalcogenides for antiferromagnetic spintronics applications.
- To demonstrate an electronically controllable antiferromagnetic switch using Fe1/3NbS2.
Main Methods:
- Measurements were performed on the intercalated transition metal dichalcogenide Fe1/3NbS2, which exhibits antiferromagnetic ordering below 42 K.
- The effect of current densities on the magnetic order was investigated, and changes in sample resistance were used to detect magnetic reorientation.
Main Results:
- Remarkably low current densities (approx. 10^4 A cm^-2) were found to effectively reorient the magnetic order in Fe1/3NbS2.
- Changes in sample resistance correlated with magnetic reorientation, confirming the material's function as an electronically accessible switch.
Conclusions:
- Fe1/3NbS2 serves as a viable material for an electronically controlled antiferromagnetic switch.
- This work establishes a foundation for developing tunable antiferromagnetic spintronic devices, with potential for room-temperature operation in related materials.
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