Year: 2025
Type: article
Abstract: The rapid advancement of generative artificial intelligence has significantly increased the demand for both energy and data storage. Magneto-ionics, which utilizes ionic motion to control magnetism, often driven by an electric field in heterostructures, has gained significant attention for its potential to enable energy-efficient modulation of magnetic properties with large effects. This study proposes a CMOS-compatible solid-state magneto-ionic system composed of all-Mn-nitrides and demonstrates that nitrogen ionic motion can induce reversible phase transitions between ferrimagnetic and antiferromagnetic Mn nitrides. This magnetic phase transition is manifested in dramatic changes in the resultant exchange bias effect, which can be increased by over an order of magnitude when more nitrogen is introduced into the nitrides during deposition and subsequently reduced by over 70% when nitrogen is taken out of the nitrides through post-annealing. Additionally, voltage-induced nitrogen ionic motion can lead to reversible changes in saturation magnetization and the exchange bias effect by 23% and 0.1 T (16%) at 5 K, respectively. These findings highlight the characteristics of this all-Mn-nitride system as an industrially viable and environmentally sustainable platform, offering tunable magnetic properties and energy-efficient operation and potential for magnetic field immunity.
Source: ACS Nano
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
Funders: National Science Foundation, King Abdullah University of Science and Technology, Global Collaborative Research, King Abdullah University of Science and Technology, Division of Materials Research, Division of Electrical, Communications and Cyber Systems, Air Force Office of Scientific Research
Awards: G1523888516, G1583459420, Magnetic Recording Media based on High Entropy Alloys, G2792818646, Effects of Quantum Confinement in Photosensors from Transition Metal Dichalcogenides, Chiral Spin Textures in Magnetic Nanostructures, G5041455364, G5120594922, G609097643, G6872458415, MRI: Acquisition of a Magnetic Property Measurements System
OpenAlex ID: W4410157444