Work

Room-Temperature Nonlinear Hall Effect in Polycrystalline Magnetic Multilayers

Year: 2026

Type: preprint

Abstract: We report a zero-field nonlinear Hall effect in sputtered polycrystalline Ta/Pt/[Pt/Co/Fe/Ir]$_5$/Pt multilayers from 2 to 300 K. Angle-resolved transport reveals macroscopic in-plane anisotropy and a second-order response. The transverse voltage scales quadratically with current and remains unchanged across magnetization reversal. Conductivity scaling reveals strong scattering contributions, and first-principles calculations yield a symmetry-allowed Berry curvature dipole. Our findings support a mixed intrinsic-extrinsic response and establish a scalable platform for nonlinear electronics

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2607.04754

Authors: Kamal, Preet, Mondal, Amiya, Kanupriya, Kalouni, Chirag, Narayan, Awadhesh, Roy, Debangsu

Institutions: Indian Institute of Technology Ropar, Indian Institute of Science Bangalore

Language: English

Topic: Magnetic properties of thin films

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Science and Engineering Research Board, Board of Research in Nuclear Sciences

Awards: G3295082266, G6900175601

OpenAlex ID: W7167619919

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