Ionic switching between supermagnetic states
Abstract
Supermagnetic states are typically set during synthesis. Changing and retaining these states requires sustained external stimulus. Without resynthesis or continued stimulus, we show, for the first time, a reversible magneto-ionic switching between superferromagnetic (SFM) and superspin-glass (SSG) states using room-temperature Li-ion transport. We utilize the incomplete lithiation of NiO into nanoscale Ni and Li2O to switch between the states. Lithiation generates a fragmented nano-Ni network that strengthens dipolar interactions and promotes SFM order with stronger memory and higher room-temperature moments. Delithiation partially regenerates NiO and drives the system into an SSG state with higher low-temperature coercivity and sharper temperature-selective memory. The interconversion between SFM and SSG persists at all measured subsequent lithiation-delithiation cycles, creating a general framework for supermagnetic switching.
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BibTeX
@misc{ahsan2026ionic,
title = {{Ionic switching between supermagnetic states}},
author = {Sumaiyatul Ahsan and Yin-Ju Yen and Andrew H. Comstock and Tanya A. Balandin and Jason D. Azoulay and Jamie H. Warner and Dario A. Arena and Faisal M. Alamgir},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.23829},
eprint = {2610.23829},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.23829},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - UNPB
TI - Ionic switching between supermagnetic states
AU - Sumaiyatul Ahsan
AU - Yin-Ju Yen
AU - Andrew H. Comstock
AU - Tanya A. Balandin
AU - Jason D. Azoulay
AU - Jamie H. Warner
AU - Dario A. Arena
AU - Faisal M. Alamgir
PY - 2026
DA - 2026/10/16
PB - arXiv
DO - 10.48550/arxiv.2610.23829
UR - https://arxiv.org/abs/2610.23829
AB - Supermagnetic states are typically set during synthesis. Changing and retaining these states requires sustained external stimulus. Without resynthesis or continued stimulus, we show, for the first time, a reversible magneto-ionic switching between superferromagnetic (SFM) and superspin-glass (SSG) states using room-temperature Li-ion transport. We utilize the incomplete lithiation of NiO into nanoscale Ni and Li2O to switch between the states. Lithiation generates a fragmented nano-Ni network that strengthens dipolar interactions and promotes SFM order with stronger memory and higher room-temperature moments. Delithiation partially regenerates NiO and drives the system into an SSG state with higher low-temperature coercivity and sharper temperature-selective memory. The interconversion between SFM and SSG persists at all measured subsequent lithiation-delithiation cycles, creating a general framework for supermagnetic switching.
ER -