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PreprintarXiv licencearXiv

Field-like Perturbation Enabled Six-state Readout in Triaxial α-Fe2O3|Pt Bi-layers

  • Aditya A. Wagh
  • Shwetha G. Bhat
  • Krishna Jha
  • Aiswarya Sukumaran
  • P. S. Anil Kumar
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Abstract

Canted antiferromagnet α-Fe2O3|Pt bilayers offer a platform for multistate memory, but spin Hall magnetoresistance (SMR) readout cannot distinguish states separated by 180∘, limiting detection to three states. We show that a field-like perturbation lifts the degeneracy of opposite states in α-Fe2O3, 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.

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Cite

BibTeXRIS
BibTeX
@misc{wagh2026fieldlike,
  title = {{Field-like Perturbation Enabled Six-state Readout in Triaxial $α$-$\mathrmFe_2\mathrmO_3$|Pt Bi-layers}},
  author = {Aditya A. Wagh and Shwetha G. Bhat and Krishna Jha and Aiswarya Sukumaran and P. S. Anil Kumar},
  howpublished = {arXiv},
  year = {2026},
  month = aug,
  doi = {10.48550/arxiv.2606.23714},
  eprint = {2606.23714},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2606.23714},
}
RIS
TY  - UNPB
TI  - Field-like Perturbation Enabled Six-state Readout in Triaxial α-Fe_2O_3|Pt Bi-layers
AU  - Aditya A. Wagh
AU  - Shwetha G. Bhat
AU  - Krishna Jha
AU  - Aiswarya Sukumaran
AU  - P. S. Anil Kumar
PY  - 2026
DA  - 2026/08/28
PB  - arXiv
DO  - 10.48550/arxiv.2606.23714
UR  - https://arxiv.org/abs/2606.23714
AB  - Canted antiferromagnet α-Fe_2O_3|Pt bilayers offer a platform for multistate memory, but spin Hall magnetoresistance (SMR) readout cannot distinguish states separated by 180^∘, limiting detection to three states. We show that a field-like perturbation lifts the degeneracy of opposite states in α-Fe_2O_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.
ER  -