Weigang Wang

Weigang Wang photo

Dr. Wang is an Assistant Professor in the Department of Physics at the University of Arizona. He received his Ph.D. degree from the University of Delaware in 2008. He was a Postdoctoral Fellow in the Department of Physics and Astronomy at Johns Hopkins University from 2008 to 2012. He joined the University of Arizona in August 2012. His work has focused on the interaction of charge, spin, and heat in magnetic nanostructures. He has systematically investigated the ballistic transport of spin-polarized electrons over insulating barriers, and the dynamic evolution of symmetry-conserved tunneling conductance in the solid-state epitaxy process. He has pioneered the research of interfacial perpendicular magnetic anisotropy at ferromagnet /oxide interfaces. He has demonstrated that the magnetic properties of metallic ferromagnets can be dramatically changed by an external electric field, and realized the electric-field-induced resistance switching in perpendicular magnetic tunnel junctions with over 100% magnetoresistance. His group is currently studying this electrostatically controlled magnetism in various systems where a marked change of  magnetic anisotropy and magnetization can be achieved by applied voltages.

1. R. Zhao, T. Boudou, W. G. Wang, C. S. Chen, D. H. Reich, "Decoupling Cell and Matrix Mechanics in Engineered Microtissues Using Magnetically Actuated Microcantilevers," Advanced Materials,25, 1699 (2013)
2. W. G. Wang, A. Pearse, M. Li, S. Hageman, A. X. Chen, F. Q. Zhu & C. L. Chien, "Parallel fabrication of magnetic tunnel junction nanopillars by nanosphere lithography," Scientific Reports, 3, 1948 (2013)
3. W. G. Wang & C. L. Chien, "Voltage-induced switching in magnetic tunnel junctions with perpendicular magnetic anisotropy," J. Phys. D: Appl. Phys. 46, 074004 (2013). 
4. S. Y. Huang, X. Fan, D. Qu, Y. P. Chen, W. G. Wang, J. Wu, T. Y. Chen, J. Q. Xiao, and C. L. Chien, "Transport Magnetic Proximity Effects in Platinum," Phys. Rev. Lett. 109, 107204 (2012)
5. W. G. Wang, M. E. Li, S. Hageman and C. L. Chien, " Electric field assisted switching in magnetic tunnel junctions," Nature Materials 11, 64 (2012)
6. S. Y. Huang, W. G. Wang, S. F. Lee, J. Kwo, and C. L. Chien, " Intrinsic spin-dependent thermal transport ," Phys. Rev. Lett. 107, 216604(2011)
7. W. G. Wang, S. Hageman, M. Li, S. X. Huang, X.M. Kou, X. Fan, J.Q. Xiao, and C. L. Chien, "Rapid thermal annealing study of magnetoresistance and perpendicular anisotropy in magnetic tunnel junctions based on MgO and CoFeB," Appl. Phys. Lett. 99,102502 (2011)
8. W. G. Wang ,C. Ni , G.X. Miao , C. Weiland , L. R. Shah , X. Fan , P. Parson ,J. Jordan-sweet , X.M. Kou, Y.P. Zhang , R. Stearrett , E.R. Nowak , R. Opila,J.S. Moodera and J. Q. Xiao, "Understanding the tunneling magnetoresistance during thermal annealing in MgO-based junctions with CoFeB electrodes," Phys. Rev. B, 81, 144406 (2010)
9. W. G. Wang, C. Ni, A. Rumaiz, Y. S. Wang, X. Fan and J. Q. Xiao, "Real-time Evolution of Tunneling Magnetoresistance During Annealing in CoFeB/MgO/CoFeB Junctions," Appl. Phys. Lett., 92, 152501 (2008)
10 T. Moriyama, C. Ni, W. G. Wang, and J.Q. Xiao, "Tunneling magnetoresistance in (001)-oriented FeCo/MgO /FeCo junctions grown by sputtering deposition," Appl. Phys. Lett., 88, 222503 (2006)