Related Experiment Video
Updated: Feb 22, 2026
Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
Enhanced skyrmion stability due to exchange frustration
S von Malottki1, B Dupé1,2, P F Bessarab3,4
1Institute of Theoretical Physics and Astrophysics, University of Kiel, 24098, Kiel, Germany.
Exchange frustration significantly enhances the stability of skyrmions, crucial for spintronic devices. This finding improves understanding of skyrmion behavior beyond simple models.
Area of Science:
- Condensed matter physics
- Materials science
- Spintronics
Background:
- Skyrmions are topologically non-trivial spin structures with potential for spintronic applications.
- Skyrmion stability against collapse into the ferromagnetic state is a critical challenge.
- Previous stability calculations often neglect complex exchange interactions.
Purpose of the Study:
- To investigate the role of exchange frustration in enhancing skyrmion stability.
- To analyze skyrmion behavior in the Pd/Fe/Ir(111) system.
- To compare results with simplified nearest-neighbor exchange models.
Main Methods:
- Utilized an atomistic spin model.
- Parametrized the model using first-principles calculations.
- Focused on the Pd/Fe/Ir(111) thin film system.
Main Results:
- Demonstrated that frustrated exchange interactions drastically enhance energy barriers and critical fields for skyrmion collapse.
- Showed significant increases in skyrmion lifetimes due to frustrated exchange.
- Found antiskyrmions to be metastable.
- Highlighted limitations of nearest-neighbor models in capturing dynamic properties.
Conclusions:
- Frustration of long-range exchange interactions is a key factor for achieving enhanced skyrmion stability.
- This approach is effective even in systems with a ferromagnetic ground state.
- Findings offer a pathway for designing more stable skyrmionic systems for spintronics.
More Related Videos
08:55Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
06:53Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
Related Concept Videos
02:42Valence Bond Theory
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
02:58Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
01:23Atomic Nuclei: Nuclear Relaxation Processes
03:06The Pauli Exclusion Principle
01:17Spin–Spin Coupling: One-Bond Coupling