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Published on: October 9, 2020
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Temperature-Induced Increase of Spin Spiral Periods
Aurore Finco1, Levente Rózsa1,2, Pin-Jui Hsu1
1Department of Physics, University of Hamburg, D-20355 Hamburg, Germany.
Physical Review Letters
|August 5, 2017
Summary
Temperature significantly alters spin spiral magnetic periods in iron films. A new model explains this by considering different magnetic interactions between coupled atomic layers, applicable to various magnetic multilayers.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Surface Science
Background:
- Spin spirals are complex magnetic structures.
- Understanding their temperature dependence is crucial for magnetic materials.
Purpose of the Study:
- Investigate the temperature effect on spin spiral magnetic periods in ultrathin iron films.
- Develop a model explaining the observed temperature dependence.
Main Methods:
- Spin-polarized scanning tunneling microscopy (SP-STM) was used.
- A classical spin model with coupled atomic layers was proposed.
Main Results:
- Magnetic period of spin spirals in Fe films on Ir(111) increased from 4 nm at 8 K to 65 nm at room temperature.
- The temperature influence is attributed to varying exchange interactions between Fe layers.
Conclusions:
- A classical spin model with magnetically coupled layers of different interaction strengths successfully reproduces experimental results.
- The proposed model is potentially applicable to other magnetic multilayers.
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