All-optical switching of magnetization energy efficient nanoscale magnetic storage devices based solely on transition metals such as Fe, Co or Ni

https://www.exeter.ac.uk/news/research/title_889344_en.html

"pivotal breakthrough... low cost and relative abundance of the constituent materials, and the unparalleled tunability... can be achieved independently of the light polarization and over a broad temperature range...By employing Ni3Pt and Co layers we were able to create an imbalance of spin-polarized current for one trillionth of a second (10-12 s) after the laser excitation, which ultimately leads to the magnetization switching"