Magnetization Dynamics in Vortex-Imprinted Ni<formula formulatype="inline"><tex Notation="TeX">$_{80}$</tex></formula> Fe<formula formulatype="inline"><tex Notation="TeX">$_{20}$</tex></formula>/Ir<formula formulatype="inline"><tex Notation="TeX">$_{20}$</tex></formula>Mn<formula formulatype="inline"><tex Notation="TeX">$_{80}$</tex></formula> Square Elements
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Bibliographic record
Abstract
The dynamic behavior of the vortex magnetization on micrometer-sized, ferromagnetic/antiferromagnetic (FM/AFM) bilayer exchange-coupled square elements is investigated using time-resolved Kerr effect microscopy and micromagnetic modeling. <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">$10 \mu$</tex> </formula> m <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">$\times 10 \mu$</tex> </formula> m square elements consisting of Ni <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex Notation="TeX">$_{80}$</tex></formula> Fe <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex Notation="TeX">$_{20}$</tex></formula> /Ir <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex Notation="TeX">$_{20}$ </tex></formula> Mn <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex Notation="TeX">$_{80}$</tex></formula> bilayers were prepared and subsequently field cooled at various field strengths <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">$H_{\rm cf}$</tex></formula> , resulting in different exchange-bias field <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">$H_{\rm ex}$</tex> </formula> profiles at the FM/AFM interface. With the presence of the <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">$H_{\rm ex}$</tex></formula> , the vortex core is displaced from the center of the square and consequently the fourfold symmetry of the Landau vortex state breaks. The spin-wave eigenmode excited upon application of a magnetic field pulse is strongly dependent on the level of the displacement of the vortex configuration, in which the mode frequency decreases for the growing domain, whereas it increases for the shrinking domain.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.016 | 0.006 |
| Meta-epidemiology (narrow) | 0.025 | 0.027 |
| Meta-epidemiology (broad) | 0.020 | 0.013 |
| Bibliometrics | 0.015 | 0.020 |
| Science and technology studies | 0.012 | 0.006 |
| Scholarly communication | 0.009 | 0.024 |
| Open science | 0.022 | 0.010 |
| Research integrity | 0.013 | 0.015 |
| Insufficient payload (model declined to judge) | 0.009 | 0.012 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it