Phys.org reported on Wednesday, October 21, 2026, that ultrafast light can be used to control ferromagnetism without relying on heating. The finding concerns a way of steering magnetic order in a ferromagnetic material using very short pulses of light, according to the outlet.
The central point of the reporting is the mechanism. Rather than driving changes in magnetism through heat, the approach described by Phys.org points to light itself as the means of control. That distinction matters because heating is the conventional route by which light is understood to affect magnetic behavior.
Ferromagnetism is the form of magnetism in which a material's magnetic moments align and can retain a lasting magnetization. The Phys.org report frames the result around controlling that order on ultrafast timescales, where pulses of light act quickly enough to influence magnetic behavior.
The summary released with the report does not include the specific material studied, the research team behind the work, or the experimental conditions. Those details would be needed to assess how broadly the effect applies and how it compares with existing methods of magnetic control.
What to watch next: whether the full study, once examined, clarifies the materials involved and whether the light-driven effect can be reproduced outside the experimental setting described by Phys.org.