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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2307.04938 |
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| _version_ | 1866914627668934656 |
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| author | Singh, Arnab Li, Junli Montoya, Sergio A. Morley, Sophie Fischer, Peter Kevan, Steve D. Fullerton, Eric E. Yao, Dao-Xin Datta, Trinanjan Roy, Sujoy |
| author_facet | Singh, Arnab Li, Junli Montoya, Sergio A. Morley, Sophie Fischer, Peter Kevan, Steve D. Fullerton, Eric E. Yao, Dao-Xin Datta, Trinanjan Roy, Sujoy |
| contents | Presence of multiple competing periodicities may result in a system to go through states with modulated periodicities, an example of which is the self-similar staircase-like structure called the Devil's staircase. Herein we report on a novel staircase structure of domain periodicity in an amorphous and achiral Fe/Gd magnetic thin film wherein the reciprocal space wavevector \textbf{Q} due to the ordered stripe domains does not evolve continuously, rather exhibits a staircase structure. Resonant X-ray scattering experiments show jumps in the periodicity of the stripe domains as a function of an external magnetic field. When resolved in components, the step change along Q$_x$ was found to be an integral multiple of a minimum step height of 7 nm, which resembles closely to the exchange length of the system. Modeling the magnetic texture in the Fe/Gd thin film as an achiral spin arrangement, we have been able to reproduce the steps in the magnetization using a Landau-Lifshitz spin dynamics calculation. Our results indicate that anisotropy and not the dipolar interaction is the dominant cause for the staircase pattern, thereby revealing the effect of achiral magnetism. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2307_04938 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Periodicity staircase in a Fe/Gd magnetic thin film Singh, Arnab Li, Junli Montoya, Sergio A. Morley, Sophie Fischer, Peter Kevan, Steve D. Fullerton, Eric E. Yao, Dao-Xin Datta, Trinanjan Roy, Sujoy Materials Science Mesoscale and Nanoscale Physics Presence of multiple competing periodicities may result in a system to go through states with modulated periodicities, an example of which is the self-similar staircase-like structure called the Devil's staircase. Herein we report on a novel staircase structure of domain periodicity in an amorphous and achiral Fe/Gd magnetic thin film wherein the reciprocal space wavevector \textbf{Q} due to the ordered stripe domains does not evolve continuously, rather exhibits a staircase structure. Resonant X-ray scattering experiments show jumps in the periodicity of the stripe domains as a function of an external magnetic field. When resolved in components, the step change along Q$_x$ was found to be an integral multiple of a minimum step height of 7 nm, which resembles closely to the exchange length of the system. Modeling the magnetic texture in the Fe/Gd thin film as an achiral spin arrangement, we have been able to reproduce the steps in the magnetization using a Landau-Lifshitz spin dynamics calculation. Our results indicate that anisotropy and not the dipolar interaction is the dominant cause for the staircase pattern, thereby revealing the effect of achiral magnetism. |
| title | Periodicity staircase in a Fe/Gd magnetic thin film |
| topic | Materials Science Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2307.04938 |