Fengyuan Yang's Laboratory
Spin Engineering in Magnetic Heterostructures

Principle Investigator:
Fengyuan Yang
Assistant Professor

Department of Physics
Ohio State University
191 West Woodruff Avenue
Columbus, Ohio 43210
Curriculum Vitae

Office: Physics Research Building 2006, phone: 614-688-4390
Lab: Smith Lab 5081, phone: 614-688-5871

Students:
Jake Knepper
Xianwei Zhao
Adam Hauser

Teaching:
Spring 2006: Physics 780.06
Autumn 2006: Physics 111
Summer 2007: Physics 517/617
Autumn 2007: Physics 111

Research Interests:

• Fabrication of multilayers and patterned structures
  Using ultra-high-vacuum (UHV) fabrication system together with lithography and focused ion beam technique to fabricate a large variety of metallic and oxide materials in thin films and patterned structures.
  
• Spin transport in semiconductor nanowires
  Spin injection, spin diffusion, and spin detection, in single-crystal semiconductor nanowire devices using nanowire LEDs and nanowire spin valves.
  

Major Instruments

• Ultrahigh vacuum sputtering system

  

• Vibrating sample magnetometer

  

• Laser-assisted chemical vapor deposition

  

Selected Publications

1. E. D. Lu, D. C. Ingram, A. R. Smith, J. W. Knepper, F. Y. Yang, "Reconstruction control of magnetic properties during epitaxial growth of ferromagnetic MnGa on wurtzite GaN(0001)", Phys. Rev. Lett. 97, 146101 (2006).
2. M. Robinson, Y. Au, J. W. Knepper, F. Y. Yang, and R. Sooryakumar, "Magnetic imaging of layer-by-layer reversal in Co/Pt multilayers with perpendicular anisotropy", Phys. Rev. B 73, 224422 (2006).
3. V. S. Gornakov, Yu. P. Kabanov, O. A. Tikhomirov, and V. I. Nikitenko, S. V. Urazhdin, F. Y. Yang, and C. L. Chien, A. J. Shapiro and R. D. Shull, "Experimental study of the microscopic mechanisms of magnetization reversal in FeNi/FeMn exchange-biased ferromagnet/ antiferromagnet polycrystalline bilayers using the magneto-optical indicator film technique", Phys. Rev. B 73, 184428 (2006).
4. H. Sang, C. L. Chien, and F. Y. Yang, "Periodicity dependence of exchange bias in [Co/Pt]N/Co/CoO multilayers with perpendicular anisotropy", J. Appl. Phys. 99, 013906 (2006).
5. J. W. Knepper and F. Y. Yang, "Oscillatory Interlayer Coupling in Co/Pt Multilayers with Perpendicular Anisotropy", Phys. Rev. B 71, 224403 (2005).
6. F. Y. Yang and C. L. Chien, "Oscillatory Exchange Bias due to an Antiferromagnet with Incommensurate Spin Density Wave", Phys. Rev. Lett. 90, 147201 (2003).
7. F. Y. Yang, C. H. Shang, C. L. Chien, T. Ambrose, J. J. Krebs, G. A. Prinz, V. I. Nikitenko, V. S. Gornakov, A. J. Shapiro, and R. D. Shull, "Multi-Step Magnetic Switching in Single-Crystal (001) Co₂MnGe Films", Phys. Rev. B 65, 174410 (2002).
8. Y. Ji, G. J. Strijkers, F. Y. Yang, C. L. Chien, J. M. Byers, A. Anguelouch, G. Xiao, and A. Gupta, "Determination of the Spin Polarization of Half-Metallic CrO₂ by Point Contact Andreev Reflection", Phys. Rev. Lett. 86, 5585 (2001).
9. F. Y. Yang and C. L. Chien, "Spiraling spin structure in exchange-coupled antiferromagnetic layer", Phys. Rev. Lett. 85, 2597 (2000).
10. F. Y. Yang, C. L. Chien, X. W. Li, A. Gupta, and Gang Xiao, "Uniaxial Anisotropy and Switching Behavior in Epitaxial CrO₂ Films", Appl. Phys. Lett. 77, 286 (2000)
11. F. Y. Yang, Kai Liu, Kimin Hong, D. H. Reich, P. C. Searson, and C. L. Chien, "Large magnetoresistance in electrodeposited single-crystal bismuth thin films", Science 284, 1335 (1999).
12. F. Y. Yang, Kai Liu, C. L. Chien, and P. C. Searson, "Large magnetoresistance and finite-size effects in electrodeposited single-crystal Bi thin films", Phys. Rev. Lett. 82, 3328 (1999).

Patent

F. Y. Yang, K. Liu, C. L. Chien, and P. C. Searson, "Bismuth thin films structure and method of construction", U.S. Patent # 6,358,392, March 19, 2002.

Complete list of publication

Presentations