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Updated: Oct 6, 2025

Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers

Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers

Published on: October 5, 2013

Assembling Diverse Skyrmionic Phases in Fe₃ GeTe₂ Monolayers.

Changsong Xu^1,2,3, Xueyang Li^1,2, Peng Chen³

¹Key Laboratory of Computational Physical Sciences (Ministry of Education), Institute of Computational Physical Sciences, State Key Laboratory of Surface Physics, and Department of Physics, Fudan University, Shanghai, 200433, China.

Advanced Materials (Deerfield Beach, Fla.)

|January 13, 2022

Summary

This summary is machine-generated.

Fourth-order interactions, not DMI, stabilize skyrmions in 2D magnets like Fe3GeTe2. This new model reveals complex topological defects and advances spintronics research.

Keywords:

Fe 3GeTe 2 first-principle-based effective Hamiltonian fourth order interactions spin invariants topological defects

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Last Updated: Oct 6, 2025

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Published on: October 5, 2013

Atomically Defined Templates for Epitaxial Growth of Complex Oxide Thin Films

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Fabricating van der Waals Heterostructures with Precise Rotational Alignment

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Area of Science:

Condensed Matter Physics
Materials Science
Spintronics

Background:

Skyrmionic magnetic states are crucial for advanced spintronics applications.
Fe3GeTe2 is a 2D magnet with a high Curie temperature, but its skyrmion behavior is debated due to symmetry constraints preventing net Dzyaloshinskii-Moriya interaction (DMI).

Purpose of the Study:

To develop an accurate theoretical model for understanding the magnetic states in Fe3GeTe2.
To elucidate the mechanisms stabilizing skyrmions and other topological defects in this material.

Main Methods:

Application of a novel method using spin invariants to construct a first-principle-based Hamiltonian.
Inclusion of symmetry considerations and spin-orbit couplings in the model.

Main Results:

Prediction of diverse topological defects formed by Bloch lines.
Identification of multiple fourth-order interactions as the key stabilizing mechanism for both Néel-type and Bloch-type skyrmions, as well as antiskyrmions.
Demonstration that these interactions do not favor specific spin rotation directions.

Conclusions:

The Dzyaloshinskii-Moriya interaction is not the primary driver for skyrmion stabilization in Fe3GeTe2.
Fourth-order interactions play a critical role in stabilizing complex magnetic textures in 2D magnets.
Spin invariants offer a general and powerful approach for studying intricate magnetic interactions.