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Information transfer by vector spin chirality in finite magnetic chains
Matthias Menzel1, Yuriy Mokrousov, Robert Wieser
1Institut für Angewandte Physik, Universität Hamburg, Jungiusstr. 11, 20355 Hamburg, Germany.
Physical Review Letters
|September 26, 2012
Summary
Researchers observed atomic-scale spin spirals in iron chains on an iridium surface. This spin chirality, influenced by surface symmetry, offers a novel method for nanoscale magnetic information transmission.
Area of Science:
- Condensed Matter Physics
- Surface Science
- Magnetism
Background:
- Vector spin chirality is a fundamental property of complex magnetic materials.
- Understanding spin chirality in low-dimensional systems is crucial for spintronics.
- One-dimensional spin-spiral states exhibit handedness or a specific rotational sense.
Purpose of the Study:
- To demonstrate the occurrence of atomic-scale spin spirals in finite individual bi-atomic Fe chains.
- To investigate the influence of surface symmetry on vector spin chirality.
- To explore the potential for nanoscale information transmission using spin chirality.
Main Methods:
- Utilized spin-polarized scanning tunneling microscopy (SP-STM).
- Studied individual bi-atomic Fe chains on the (5×1)-Ir(001) surface.
- Analyzed the atomic-scale spin structure and chirality.
Main Results:
- Confirmed the presence of atomic-scale spin spirals in individual Fe chains.
- Showed that broken inversion symmetry at the Ir(001) surface dictates a unique direction of vector spin chirality.
- Demonstrated that spin direction changes can be detected tens of nanometers away along the chain.
Conclusions:
- The broken inversion symmetry of the surface is key in establishing a preferred spin chirality direction.
- This controlled spin spiral in Fe chains provides a unique rotational sense.
- Offers a novel pathway for transmitting magnetic information at the nanoscale.
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