William E. Bailey


1140 S.W. Mudd

Tel(212) 854-3090

William E. Bailey works in the emerging field of spintronics, which measures and manipulates an electron’s spin as opposed to its charge. Advances in spintronics help create better performing electronics that are faster and can store more data, while using power with greater efficiency. 

Research Interests

Nanoscale magnetic films and heterostructures, materials issues in spin-polarized transport, materials engineering of magnetic dynamics

Building on his research in magnetic thin films and heterostructures (ultrathin films of stacked materials), he is particularly interested in finding new functional properties in heterostructures of ferromagnets with other materials (metals, insulators, semiconductors). In recent years, his group has been investigating the possibility of controlling the flow of “pure” spin currents (without charge, or electrical currents) in ferromagnetic heterostructures. His lab specializes in high-speed/high-frequency magnetization dynamics in sheet-level films and has developed unique tools in magnetic materials deposition. He is also interested in the design of magnetic materials with reduced energy loss for computing applications. His research delves into nanoscale magnetic films and heterostructures, materials issues in spin polarized transport, and materials engineering of magnetic dynamics.

Bailey obtained a ScB from Brown in 1993, a MS from Stanford in 1995, and a PhD from Stanford in 1999. Prior to joining Columbia Engineering, he held a National Research Council Postdoctoral Fellowship at the National Institute of Standards and Technology (NIST) in Boulder, Colorado. Honors for his research include the National Science Foundation CAREER and Army Research Office Young Investigator awards.

Research Experience

National Research Council Postdoctoral Fellowship, National Institute of Standards and Technology (NIST), Boulder, Colorado, 1999 – 2001

Professional Experience

Associate Professor, Materials Science and of Applied Physics and Applied Mathematics, Columbia Engineering

Honors & Awards

  • National Science Foundation CAREER Award
  • Army Research Office Young Investigator Award

Selected Publications

  • Yi Li, Wei Cao, W.E. Bailey. Characterization of spin relaxation anisotropy in Co using spin pumping. Physical Review B (Condensed Matter) 94 174439 (2016)
  • Cheng Cheng, Wei Cao, W.E. Bailey. Phase-resolved imaging of edge-mode spin waves using scanning transmission x-ray microscopy. Journal of Magnetism and Magnetic Materials (2017)
  • M. Caminale, A. Ghosh, S. Auffret, U. Ebels, K. Ollefs, F. Wilhelm, A. Rogalev, W.E. Bailey. Spin-pumping damping and magnetic proximity effect in Pd and Pt spin sink layers *Editors' suggestion (link) Physical Review B (Condensed Matter) 94 014414 (2016) 
  • H. Yang, Y. Li, W.E. Bailey. Large spin pumping effect in antisymmetric precession of Ni79Fe21/ Ru/ Ni79Fe21. Applied Physics Letters 108 242404 (2016) 
  • Yi Li, W.E. Bailey. Wavenumber-dependent Gilbert damping in metallic ferromagnets. Physical Review Letters, 116 117602 (2016)