Field-like Perturbation Enabled Six-state Readout in Triaxial $α$-$\mathrm{Fe}_{2}\mathrm{O}_{3}$|Pt Bi-layers

[2606.23714] Field-like Perturbation Enabled Six-state Readout in Triaxial $α$-$\mathrm{Fe}_{2}\mathrm{O}_{3}$|Pt Bi-layers Skip to main content Search Submit Donate Log in Condensed Matter > Mesoscale and Nanoscale Physics arXiv:2606.23714 (cond-mat) [Submitted on 16 Jun 2026 ( v1 ), last revised 28 Aug 2026 (this version, v2)] Title: Field-like Perturbation Enabled Six-state Readout in Triaxial $α$-$\mathrm{Fe}_{2}\mathrm{O}_{3}$|Pt Bi-layers Authors: Aditya A. Wagh (1), Shwetha G. Bhat (1), Krishna Jha (1), Aiswarya Sukumaran (2), P. S. Anil Kumar (1) ((1) Department of Physics, Indian Institute of Science, Bengaluru, INDIA, (2) Department of Physics, Indian Institute of Science Education and Research, Tirupati, INDIA) View PDF HTML (experimental) Abstract: Canted antiferromagnet $\alpha$-$\mathrm{Fe}_{2}\mathrm{O}_{3}$|Pt bilayers offer a platform for multistate memory, but spin Hall magnetoresistance (SMR) readout cannot distinguish states separated by $180^{\circ}$, limiting detection to three states. We show that a field-like perturbation lifts the degeneracy of opposite states in $\alpha$-$\mathrm{Fe}_{2}\mathrm{O}_{3}$, enabling the resolution of six states in the SMR signal. We introduce a dual-modulation SMR method to mitigate thermal drifts and enable reliable readout. Computations of first- and second-harmonic SMR reveal the role of exchange, anisotropy and field-like perturbations in resolving the states. Comments: main article: 8 pages, 5 figures and Supplemental material: 7 pages and 6 figures. Revised version with updated figures, improved discussion and modified abstract Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall) ; Materials Science (cond-mat.mtrl-sci); Strongly Correlated Electrons (cond-mat.str-el) Cite as: arXiv:2606.23714 [cond-mat.mes-hall] (or arXiv:2606.23714v2 [cond-mat.mes-hall] for this version) https://doi.org/10.48550/arXiv.2606.23714 Focus to learn more arXiv-issued DOI via DataCite Submission history From: Aditya A. Wagh [ view email ] [v1] Tue, 16 Jun 2026 09:28:10 UTC (12,799 KB) [v2] Fri, 28 Aug 2026 07:07:31 UTC (14,332 KB) Full-text links: Access Paper: View PDF HTML (experimental) TeX Source view license Current browse context: cond-mat.mes-hall < prev | next > new | recent | 2026-06 Change to browse by: cond-mat cond-mat.mtrl-sci cond-mat.str-el References & Citations NASA ADS Google Scholar Semantic Scholar export BibTeX citation Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer ( What is the Explorer? ) Connected Papers Toggle Connected Papers ( What is Connected Papers? ) Litmaps Toggle Litmaps ( What is Litmaps? ) scite.ai Toggle scite Smart Citations ( What are Smart Citations? ) Code, Data, Media Code, Data and Media Associated with this Article alphaXiv Toggle alphaXiv ( What is alphaXiv? ) Links to Code Toggle CatalyzeX Code Finder for Papers ( What is CatalyzeX? ) DagsHub Toggle DagsHub ( What is DagsHub? ) GotitPub Toggle Gotit.pub ( What is GotitPub? ) Huggingface Toggle Hugging Face ( What is Huggingface? ) ScienceCast Toggle ScienceCast ( What is ScienceCast? ) Demos Demos Replicate Toggle Replicate ( What is Replicate? ) Spaces Toggle Hugging Face Spaces ( What is Spaces? ) Spaces Toggle TXYZ.AI ( What is TXYZ.AI? ) Related Papers Recommenders and Search Tools Link to Influence Flower Influence Flower ( What are Influence Flowers? ) Core recommender toggle CORE Recommender ( What is CORE? ) IArxiv recommender toggle IArxiv Recommender ( What is IArxiv? ) Author Venue Institution Topic About arXivLabs arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs . Which authors of this paper are endorsers? | Disable MathJax ( What is MathJax? ) We gratefully acknowledge support from our major funders , member institutions , and all contributors. About · Help · Contact · Subscribe · Copyright · Privacy · Accessibility · Operational Status (opens in new tab) Major funding support from

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