Electric-field control of ferromagnetism in a Co-Fe-Ta-B amorphous alloy

Publication date: 5 April 2018
Source:Materials & Design, Volume 143
Author(s): Yingqi Zhang, Shaofan Zhao, Cheng Song, Wenjian Liu, Kefu Yao, Na Chen
We report the formation of a ferromagnetic Co55.0Fe24.5Ta0.1B20.4 amorphous alloy by magnetron sputtering, which exhibits positive magnetoresistance without saturation even in very high magnetic fields. This suggests that the s-like electrons responsible for the electrical conduction are spin-polarized through s-d hybridization. Owing to the electromagnetic interplay of the spin-polarized conduction electrons with the local magnetic moments, the electric-field control of room-temperature ferromagnetism is realized in the amorphous alloy. Our results offer insights for exploring the multi-functionalities of ferromagnetic amorphous alloys and extending their applications to a wide variety of electronics including magnetic tunnel junctions and compact disks.

Graphical abstract

http://ift.tt/2nE7w6f