Structural properties and recrystallization effects in ion beam modified B20-type FeGe films
Disordered iron germanium (FeGe) has recently garnered interest as a testbed for a variety of magnetic phenomena as well as for use in magnetic memory and logic applications. This is partially owing to its ability to host skyrmions and antiskyrmions—nanoscale whirlpools of magnetic moments that coul...
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AIP Publishing LLC
2025-01-01
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| Series: | APL Materials |
| Online Access: | http://dx.doi.org/10.1063/5.0237131 |
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| author | Jiangteng Liu Ryan Schoell Xiyue S. Zhang Hongbin Yang M. B. Venuti Hanjong Paik David A. Muller Tzu-Ming Lu Khalid Hattar Serena Eley |
| author_facet | Jiangteng Liu Ryan Schoell Xiyue S. Zhang Hongbin Yang M. B. Venuti Hanjong Paik David A. Muller Tzu-Ming Lu Khalid Hattar Serena Eley |
| author_sort | Jiangteng Liu |
| collection | DOAJ |
| description | Disordered iron germanium (FeGe) has recently garnered interest as a testbed for a variety of magnetic phenomena as well as for use in magnetic memory and logic applications. This is partially owing to its ability to host skyrmions and antiskyrmions—nanoscale whirlpools of magnetic moments that could serve as information carriers in spintronic devices. In particular, a tunable skyrmion–antiskyrmion system may be created through precise control of the defect landscape in B20-phase FeGe, motivating the development of methods to systematically tune disorder in this material and understand the ensuing structural properties. To this end, we investigate a route for modifying magnetic properties in FeGe. In particular, we irradiate epitaxial B20-phase FeGe films with 2.8 MeV Au4+ ions, which creates a dispersion of amorphized regions that may preferentially host antiskyrmions at densities controlled by the irradiation fluence. To further tune the disorder landscape, we conduct a systematic electron diffraction study with in situ annealing, demonstrating the ability to recrystallize controllable fractions of the material at temperatures ranging from ∼150 to 250 °C. Finally, we describe the crystallization kinetics using the Johnson–Mehl–Avrami–Kolmogorov model, finding that the growth of crystalline grains is consistent with diffusion-controlled one-to-two dimensional growth with a decreasing nucleation rate. |
| format | Article |
| id | doaj-art-dbc06c535fe047818bd45d18b4fdce85 |
| institution | Kabale University |
| issn | 2166-532X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
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| spelling | doaj-art-dbc06c535fe047818bd45d18b4fdce852025-02-03T16:42:31ZengAIP Publishing LLCAPL Materials2166-532X2025-01-01131011112011112-1010.1063/5.0237131Structural properties and recrystallization effects in ion beam modified B20-type FeGe filmsJiangteng Liu0Ryan Schoell1Xiyue S. Zhang2Hongbin Yang3M. B. Venuti4Hanjong Paik5David A. Muller6Tzu-Ming Lu7Khalid Hattar8Serena Eley9Department of Electrical and Computer Engineering, University of Washington, Seattle, Washington 98195, USASandia National Laboratories, Albuquerque, New Mexico 87123, USASchool of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USASchool of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USADepartment of Physics, Colorado School of Mines, Golden, Colorado 80401, USAPlatform for the Accelerated Realization, Analysis, and Discovery of Interface Materials, Cornell University, Ithaca, New York 14853, USASchool of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USACenter for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87123, USADepartment of Nuclear Engineering, University of Tennessee, Knoxville, Tennessee 37996, USADepartment of Electrical and Computer Engineering, University of Washington, Seattle, Washington 98195, USADisordered iron germanium (FeGe) has recently garnered interest as a testbed for a variety of magnetic phenomena as well as for use in magnetic memory and logic applications. This is partially owing to its ability to host skyrmions and antiskyrmions—nanoscale whirlpools of magnetic moments that could serve as information carriers in spintronic devices. In particular, a tunable skyrmion–antiskyrmion system may be created through precise control of the defect landscape in B20-phase FeGe, motivating the development of methods to systematically tune disorder in this material and understand the ensuing structural properties. To this end, we investigate a route for modifying magnetic properties in FeGe. In particular, we irradiate epitaxial B20-phase FeGe films with 2.8 MeV Au4+ ions, which creates a dispersion of amorphized regions that may preferentially host antiskyrmions at densities controlled by the irradiation fluence. To further tune the disorder landscape, we conduct a systematic electron diffraction study with in situ annealing, demonstrating the ability to recrystallize controllable fractions of the material at temperatures ranging from ∼150 to 250 °C. Finally, we describe the crystallization kinetics using the Johnson–Mehl–Avrami–Kolmogorov model, finding that the growth of crystalline grains is consistent with diffusion-controlled one-to-two dimensional growth with a decreasing nucleation rate.http://dx.doi.org/10.1063/5.0237131 |
| spellingShingle | Jiangteng Liu Ryan Schoell Xiyue S. Zhang Hongbin Yang M. B. Venuti Hanjong Paik David A. Muller Tzu-Ming Lu Khalid Hattar Serena Eley Structural properties and recrystallization effects in ion beam modified B20-type FeGe films APL Materials |
| title | Structural properties and recrystallization effects in ion beam modified B20-type FeGe films |
| title_full | Structural properties and recrystallization effects in ion beam modified B20-type FeGe films |
| title_fullStr | Structural properties and recrystallization effects in ion beam modified B20-type FeGe films |
| title_full_unstemmed | Structural properties and recrystallization effects in ion beam modified B20-type FeGe films |
| title_short | Structural properties and recrystallization effects in ion beam modified B20-type FeGe films |
| title_sort | structural properties and recrystallization effects in ion beam modified b20 type fege films |
| url | http://dx.doi.org/10.1063/5.0237131 |
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