Britain International of Exact Sciences Journal (BIoEx Journal)
Vol 8 No 1 (2026): Britain International of Exact Sciences Journal, January

Mathematical Modeling and Optimization of the Anomalous Hall Angle in Magnetic Topological Semimetals

Belay Sitotaw Goshu (Unknown)



Article Info

Publish Date
10 Nov 2025

Abstract

Magnetic topological semimetals like Co3Sn2S2 exhibit a large anomalous Hall angle (θA), making them promising for magnetic sensors and spin-orbit torque (SOT) devices, but scalable synthesis and real-time control remain challenging. This study aimed to predict and optimize θA in Co3Sn2S2, focusing on scalable thin-film deposition and dynamic modulation for enhanced device applicability. A predictive model (θA = arctan(σxy/σxx)) was validated against experimental data (RMSE = 10.59°), followed by simulations of thin-film deposition (substrate temperature: 200–600°C, deposition rate: 0.1–2.0 Å/s) and dynamic modulation (strain: -2% to 2%, electric field: 0–0.5 V/nm). The model accurately predicted θA for Fe-doped Co3Sn2S2 (25.6° vs. 24.8° experimental) but overestimated TbPdBi (error: 10.8°). Thin-film deposition at 208°C and 0.1 Å/s yielded θA = 7.2° (σxy = 528 Ω⁻¹ cm⁻¹, ρxx = 239 μΩ cm), below experimental benchmarks (24.8°). Dynamic modulation at strain = 1.8% and electric field = 0.50 V/nm achieved θA = 7.6° (σxy = 1155 Ω⁻¹ cm⁻¹, ρxx = 115 μΩ cm), suitable for basic sensors but insufficient for SOT devices (θA > 20°). While the framework captures θA trends, current synthesis and modulation methods yield θA values below device requirements, necessitating improvements. Higher deposition temperatures (500°C–600°C), stronger modulation (strain > 3%, electric field > 1.0 V/nm), and advanced modeling (e.g., DFT-derived Berry curvature) are recommended to achieve θA > 15°, enabling practical AHE applications.

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Journal Info

Abbrev

bioex

Publisher

Subject

Biochemistry, Genetics & Molecular Biology Chemistry Mathematics Medicine & Pharmacology Physics

Description

Britain International of Exact Sciences Journal is a peer-reviewed journal published in January, May and September by BIAR Publisher. BIoEx Journal welcomes research paper in mathematics, physics, chemistry, biology, engineering, medical sciences, argicultural sciences and other related fields which ...