Tunable Magnetic and Transport Properties in Amorphous Mn<sub>x</sub>Ge<sub>1-x</sub> Thin Films

ORAL

Abstract

B20-type MnGe is well known for hosting magnetic skyrmions driven by Dzyaloshinskii–Moriya interactions (DMI), making it a benchmark system for chiral magnetism. However, the requirement of crystalline order limits its compositional flexibility and scalability. In contrast, amorphous systems offer a unique platform where tunable composition and disorder can be harnessed to tailor magnetic interactions and emergent spin textures. In this study, we have successfully grown amorphous MnxGe1-x thin films using DC magnetron co-sputtering across a wide range of compositions and examined their magnetic and transport properties. The controlled variation in Mn concentration enables modulation of magnetic ordering and carrier behavior, revealing trends distinct from their crystalline counterparts. Our findings highlight that amorphous MnxGe1-x alloys can emulate and extend key characteristics of crystalline B20 systems, opening pathways toward disorder-engineered skyrmionic states and scalable spintronic materials with tunable magnetic properties.

*This work was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division under Contract No. DE-AC02-05-CH11231 (NEMM program MSMAG).

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Presenters

  • Josef Seelmann

    • University of California, Berkeley

Authors

  • Subhashree Satapathy

    • Lawrence Berkeley National Laboratory

  • Josef Seelmann

    • University of California, Berkeley

  • Linus Stricker

    • Julius-Maximilians University of Wuerzburg

  • Soren Bear

    • University of California, Berkeley

  • Reed Yalisove

    • University of California, Berkeley

  • Mary Scott

    • University of California, Berkeley

  • Manel M Ruiz

    • University of California, Berkeley

  • Frances Hellman

    • University of California,Berkeley
    • University of California, Berkeley