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  Short period magnetization texture of B20–MnGe explained by thermally fluctuating local moments

Mendive-Tapia, E., dos Santos Dias, M., Grytsiuk, S., Staunton, J. B., Blügel, S., & Lounis, S. (2021). Short period magnetization texture of B20–MnGe explained by thermally fluctuating local moments. Physical Review B, 103(2): 024410. doi:10.1103/PhysRevB.103.024410.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0007-F003-6 Version Permalink: https://hdl.handle.net/21.11116/0000-000B-6014-2
Genre: Journal Article

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 Creators:
Mendive-Tapia, Eduardo1, Author           
dos Santos Dias, Manuel2, Author           
Grytsiuk, Sergii2, Author           
Staunton, Julie B.3, Author           
Blügel, Stefan2, Author           
Lounis, Samir2, 4, Author           
Affiliations:
1Computational Phase Studies, Computational Materials Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863341              
2Peter Grünberg Institut, Institute for Advanced Simulation, Forschungszentrum Jülich, JARA, Jülich, 52425, Germany, ou_persistent22              
3Department of Physics, University of Warwick, Coventry, CV4 7AL, UK, ou_persistent22              
4Faculty of Physics, University of Duisburg-Essen, Duisburg, 47053, Germany, ou_persistent22              

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Free keywords: Free energy; Germanium compounds; Iron compounds; Magnetism; Manganese compounds; Silicon compounds; Textures, Dzyaloshinskii-moriya; Isotropic interaction; Length scale; Local moments; Magnetic state; Nano-meter scale; Paramagnetic state; Short periods, Boron compounds
 Abstract: B20-type compounds, such as MnSi and FeGe, host helimagnetic and skyrmion phases at the mesoscale, which are canonically explained by the combination of ferromagnetic isotropic interactions with weaker chiral Dzyaloshinskii-Moriya ones. Mysteriously, MnGe evades this paradigm as it displays a noncollinear magnetic state at a much shorter nanometer scale. Here we show that the length scale and volume-dependent magnetic properties of MnGe stem from purely isotropic exchange interactions, generally obtained in the paramagnetic state. Our approach is validated by comparing MnGe with the canonical B20-helimagnet FeGe. The free energy of MnGe is calculated, from which we show how triple-q magnetic states can stabilize by adding higher-order interactions. © 2021 authors. Published by the American Physical Society.

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Language(s): eng - English
 Dates: 2021-01-11
 Publication Status: Issued
 Pages: -
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 Rev. Type: Peer
 Identifiers: DOI: 10.1103/PhysRevB.103.024410
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Project name : The authors gratefully acknowledge fruitful discussions with N. Kanazawa, B. Zimmermann, and S. Brinker as well as P. Mavropoulos for sharing his Monte Carlo code with us. E.M.-T. acknowledges funding from the DAAD Short-Term Grants (2019) and the priority programme SPP1599 “Ferroic Cooling” (Grant No. HI1300/6-2). E.M.-T., M.d.S.D., S.L., and S.B. are grateful for the support from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (ERC-consolidator Grant No. 681405 - DYNASORE, and ERC-synergy Grant No. 856538 - 3D MAGiC). We acknowledge financial support from the DARPA TEE program through grant MIPR (No. HR0011831554) from DOI, from Deutsche Forschungsgemeinschaft (DFG) through SPP 2137 “Skyrmionics” (Project BL 444/16), the Collaborative Research Centers SFB 1238 (Project C01) as well as computing resources at the supercomputers JURECA at Juelich Supercomputing Centre and JARA-HPC from RWTH Aachen University (Projects jara0224 and jara3dmagic). J.B.S. acknowledges funding from EPSRC (UK) Grant No. EP/M028941/1
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 103 (2) Sequence Number: 024410 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008