تقرير
Periodicity staircase in a Fe/Gd magnetic thin film
العنوان: | Periodicity staircase in a Fe/Gd magnetic thin film |
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المؤلفون: | Singh, Arnab, Li, Junli, Montoya, Sergio A., Morley, Sophie, Fischer, Peter, Kevan, Steve D., Fullerton, Eric E., Yao, Dao-Xin, Datta, Trinanjan, Roy, Sujoy |
المصدر: | npj Quantum Mater. 9, 2 (2024) |
سنة النشر: | 2023 |
المجموعة: | Condensed Matter |
مصطلحات موضوعية: | Condensed Matter - Materials Science, Condensed Matter - Mesoscale and Nanoscale Physics |
الوصف: | 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. Comment: 10 pages, 5 figures |
نوع الوثيقة: | Working Paper |
DOI: | 10.1038/s41535-023-00613-3 |
URL الوصول: | http://arxiv.org/abs/2307.04938 |
رقم الأكسشن: | edsarx.2307.04938 |
قاعدة البيانات: | arXiv |
DOI: | 10.1038/s41535-023-00613-3 |
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