Move over, silicon switches: There's a new way to compute

Logic and memory devices, such as the hard drives in computers, now use nanomagnetic mechanisms to store and manipulate information. Unlike silicon transistors, which have fundamental efficiency limitations, they require no energy to maintain their magnetic state: Energy is needed only for reading and writing information.

source https://www.lifetechnology.com/blogs/life-technology-news-blog/move-over-silicon-switches-theres-a-new-way-to-compute