Fengyuan Yang's Laboratory
Magnetism and Spin in 2D and 1D Heterostructures
Principle Investigator:
Fengyuan Yang
Associate Professor
Department of Physics
Ohio State University
191 West Woodruff Avenue
Columbus, Ohio 43210
Curriculum Vitae
Office: Physics Research Building 2010, phone: 614-688-4390
Lab: Physics Research Building 0109, phone: 614-688-5871
Postdoctoral Researcher:
Adam Hauser
Students:
Brian Peters
Nichlos Minutillo
Hailong Wang
James Gallagher
Jeremy Lucy
Teaching:
Spring 2012: Physics 780.06, Condensed Matter Physics
Winter 2012: Physics 112, Electricity and Magnetism
Autumn 2011: Physics 112, Electricity and Magnetism
Research Interests:
-
Complex Oxide Epitaxial Films and Multilayers
Using ultra-high-vacuum (UHV) sputtering system to fabricate a variety of complex oxide films, including half-metallic double perovskite epitaxial films for magneto-electronic applications. The UHV environment down to 4 x 10-10 Torr, precise control of sputter gas pressure, O2 compatible sample heater up to 1000 oC, and a number of growth geometries enable the fabrication of high quality oxide epitaxial films and multilayers.
-
Spin Dynamics and Spin Transport in Semiconductor Nanowires
Spin relaxation, injection, spin diffusion, and spin detection, in single-crystal semiconductor nanowires using prototype nanowire devices and dielectric matching.
-
Fabrication of Multilayers and Patterned Structures
Using UHV sputtering system together with lithography and focused ion beam technique to fabricate a large variety of metallic materials in thin films and patterned structures for superconducting and magnetic studies.
Major Instruments
Selected Publications
-
A. J. Hauser, J. Zhang, L. Mier, R. A. Ricciardo, P. M. Woodward, T. L. Gustafson, L. J. Brillson, and F. Y. Yang, "Characterization of Electronic Structure and Defect States of Thin Epitaxial BiFeO3 Films by UV-Vis Absorption and Cathodoluminescence Spectroscopies," Appl. Phys. Lett. 92, 222901 (2008).
-
W. C. Liu, C. L. Mak, K. H. Wong, C. Y. Lo, S. W. Or, W. Zhou, A. Hauser, F. Y. Yang, and R. Sooryakumar, "Magnetoelectric and dielectric relaxation properties of the high Curie temperature composite Sr1.9Ca0.1NaNb5O15-CoFe2O4," J. Phys. D: Appl. Phys. 41, 125402 (2008).
-
X. W. Zhao and F. Y. Yang, "Synthesis of Epitaxial Silicon Nanowires on Si(111) Substrates Using Ultrahigh Vacuum Magnetron Sputtering," J. Vac. Sci. Technol. B 26, 675 (2008).
-
T. R. Lemberger, I. Hetel, A. J. Hauser, and F. Y. Yang, "Superfluid density of superconductor-ferromagnet bilayers," J. Appl. Phys. 103, 07C701 (2008).
-
X. P. Xie, X. W. Zhao, J. W. Knepper, F. Y. Yang, and R. Sooryakumar, "Evolution of magnetic domain reversal with temperature in Co/Pt multilayers observed by magneto-optical Kerr imaging," Phys. Rev. B 76, 184433 (2007).
-
X. W. Zhao, A. J. Hauser, T. R. Lemberger, and F. Y. Yang, "Growth control of GaAs nanowires using pulsed laser deposition with arsenic over pressure," Nanotechnology 18, 485608 (2007).
-
T. R. Lemberger, I. Hetel, J. W. Knepper, and F. Y. Yang, "Penetration depth study of very thin superconducting Nb films," Phys. Rev. B 76, 094515 (2007).
-
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).
-
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).
-
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).
-
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).
-
J. W. Knepper and F. Y. Yang, "Oscillatory Interlayer Coupling in Co/Pt Multilayers with Perpendicular Anisotropy," Phys. Rev. B 71, 224403 (2005).
-
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).
-
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).
-
F. Y. Yang and C. L. Chien, "Spiraling spin structure in exchange-coupled antiferromagnetic layer," Phys. Rev. Lett. 85, 2597 (2000).
-
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).
-
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.
fyyang@mps.ohio-state.edu
Last modified: Sept. 16, 2008