4 years ago

Voltage-controlled interlayer coupling in perpendicularly magnetized magnetic tunnel junctions

Voltage-controlled interlayer coupling in perpendicularly magnetized magnetic tunnel junctions
D. Reifsnyder Hickey, Yaohua Liu, A. Kundu, D. J. Keavney, M. Rosales, T. Newhouse-Illige, M. Xu, J. W. Freeland, X. Wang, Chong Bi, Y. H. Xu, W. G. Wang, Shufeng Zhang, X. M. Cheng, K. A. Mkhoyan, H. Almasi, C. J. Sun
Magnetic interlayer coupling is one of the central phenomena in spintronics. It has been predicted that the sign of interlayer coupling can be manipulated by electric fields, instead of electric currents, thereby offering a promising low energy magnetization switching mechanism. Here we present the experimental demonstration of voltage-controlled interlayer coupling in a new perpendicular magnetic tunnel junction system with a GdOx tunnel barrier, where a large perpendicular magnetic anisotropy and a sizable tunnelling magnetoresistance have been achieved at room temperature. Owing to the interfacial nature of the magnetism, the ability to move oxygen vacancies within the barrier, and a large proximity-induced magnetization of GdOx, both the magnitude and the sign of the interlayer coupling in these junctions can be directly controlled by voltage. These results pave a new path towards achieving energy-efficient magnetization switching by controlling interlayer coupling.

Publisher URL: http://www.nature.com/articles/ncomms15232

DOI: 10.1038/ncomms15232

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.