2025-09-26 チャルマース工科大学
It is anticipated that, within just a few decades, the surging volume of digital data will constitute one of the world’s largest energy consumers. Now, researchers at Chalmers University of Technology, Sweden, have made a breakthrough that could shift the paradigm: an atomically thin material that enables two opposing magnetic forces to coexist – dramatically reducing energy consumption in memory devices by a factor of ten. This discovery could pave the way for a new generation of ultra-efficient, reliable memory solutions for AI, mobile technology and advanced data processing.
＜関連情報＞
- https://news.cision.com/chalmers/r/material-breakthrough-paves-way-for-major-energy-savings-in-memory-chips,c4240160
- https://advanced.onlinelibrary.wiley.com/doi/10.1002/adma.202502822
共存する非自明なファンデルワールス磁気秩序が磁場フリーのスピン軌道トルク磁化ダイナミクスを可能にする Coexisting Non-Trivial Van der Waals Magnetic Orders Enable Field-Free Spin-Orbit Torque Magnetization Dynamics
Bing Zhao, Lakhan Bainsla, Soheil Ershadrad, Lunjie Zeng, Roselle Ngaloy, Peter Svedlindh, Eva Olsson, Biplab Sanyal, Saroj P. Dash
Advanced Materials Ppublished: 01 July 2025
DOI:https://doi.org/10.1002/adma.202502822
Abstract
The discovery of van der Waals (vdW) magnetic materials exhibiting non-trivial and tunable magnetic interactions can lead to exotic magnetic states that are not readily attainable with conventional materials. Such vdW magnets can provide a unique platform for studying new magnetic phenomena and realizing magnetization dynamics for energy-efficient and non-volatile spintronic memory and computing technologies. Here, the coexistence of ferromagnetic and antiferromagnetic orders in vdW magnet (Co0.5Fe0.5)5-xGeTe2 (CFGT) above room temperature, inducing an intrinsic exchange bias and canted perpendicular magnetism is discovered. Such non-trivial intrinsic magnetic order enables to realize energy-efficient, magnetic field-free, and deterministic spin-orbit torque (SOT) switching of CFGT in heterostructure with Pt. These experiments, in conjunction with density functional theory and Monte Carlo simulations, demonstrate the coexistence of non-trivial magnetic orders in CFGT, which enables field-free SOT magnetization dynamics in spintronic devices.
