Electrical Control of Metallic Heavy-Metal-Ferromagnet Interfacial States

Chong Bi, Congli Sun, Meng Xu, Ty Newhouse-Illige, Paul M. Voyles, Weigang Wang

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


Voltage-control effects provide an energy-efficient means of tailoring material properties, especially in highly integrated nanoscale devices. However, only insulating and semiconducting systems can be controlled so far. In metallic systems, there is no electric field due to electron screening effects and thus no such control effect exists. Here, we demonstrate that metallic systems can also be controlled electrically through ionic rather than electronic effects. In a Pt/Co structure, the control of the metallic Pt/Co interface can lead to unprecedented control effects on the magnetic properties of the entire structure. Consequently, the magnetization and perpendicular magnetic anisotropy of the Co layer can be independently manipulated to any desired state, the efficient spin toques can be enhanced about 3.5 times, and the switching current can be reduced about one order of magnitude. This ability to control a metallic system may be extended to control other physical phenomena.

Original languageEnglish (US)
Article number034003
JournalPhysical Review Applied
Issue number3
StatePublished - Sep 7 2017

ASJC Scopus subject areas

  • General Physics and Astronomy


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