Work

Ionic switching between supermagnetic states

Year: 2026

Type: preprint

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.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2610.23829

Authors: Ahsan, Sumaiyatul, Yen, Yin-Ju, Comstock, Andrew H., Balandin, Tanya A., Azoulay, Jason D., Warner, Jamie H., Arena, Dario A., Alamgir, Faisal M.

Institutions: Georgia Institute of Technology, The University of Texas at Austin, University of South Florida

Language: English

Topic: Magnetic Properties and Synthesis of Ferrites

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funder: Air Force Office of Scientific Research

OpenAlex ID: W7222982642

Cites: 5

Cited by:

Related to: 10