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Publications

2011
Spin torque ferromagnetic resonance induced by the Spin Hall Effect
L. Q. Liu, T. Moriyama, D. C. Ralph, and R. A. Buhrman, Phys. Rev. Lett. 106, 036601 (2011). [pdf]

2010
Tunnel magnetoresistance and spin torque switching in MgO-based magnetic tunnel junctions with a Co/Ni multilayer electrode
T. Moriyama, T. J. Gudmundsen, P. Y. Huang, L. Q. Liu, D. A. Muller, D. C. Ralph, and R. A. Buhrman, Appl. Phys. Lett. 97, 072513 (2010). [pdf]

Spin-torque driven magnetic vortex self-oscillations in perpendicular magnetic fields
G. Finocchio, V. S. Pribiag, L. Torres, R. A. Buhrman, and B. Azzerboni, Appl. Phys. Lett. 96, 102508 (2010). [pdf]

Single-shot Time-Domain Studies of Spin-Torque-Driven Switching in Magnetic Tunnel Junctions
Y. T. Cui, G. Finocchio, C. Wang, J. A. Katine, R. A. Buhrman, and D. C. Ralph, Phys. Rev. Lett. 104, 097201 (2010). [pdf]

2009
Long-timescale fluctuations in zero-field magnetic vortex oscillations driven by dc spin-polarized current
V. S. Pribiag, G. Finocchio, B. J. Williams, D. C. Ralph, and R. A. Buhrman, Phys. Rev. B 80, 180411(R) (2009). [pdf]

Sensitivity of spin-torque diodes for frequency-tunable resonant microwave detection

C. Wang, Y.-T. Cui, J. Z. Sun, J. A. Katine, R. A. Buhrman, and D. C. Ralph, J. Appl. Phys. 106, 053905 (2009). [pdf]

Atomic-scale spectroscopic imaging of CoFeB/Mg-B-O/CoFeB magnetic tunnel junctions
J. J. Cha, J. C. Read, W. F. Egelhoff Jr., P. Y. Huang, H. W. Tseng, Y. Li, R. A. Buhrman, and D. A. Muller, Appl. Phys. Lett. 95, 032506 (2009). [pdf]

Ultrafast switching of a nanomagnet by a combined out-of-plane and in-plane polarized spin-current pulse
O. J. Lee, V. S. Pribiag, P. M. Braganca, P. G. Gowtham, D. C. Ralph, and R. A. Buhrman, Appl. Phys. Lett. 95, 012506 (2009). [pdf]

Reduction of the spin-torque critical current by partially canceling the free layer demagnetization field
L. Q. Liu, T. Moriyama, D. C. Ralph, and R. A. Buhrman, Appl. Phys. Lett. 94, 122508 (2009). [pdf]

High magnetoresistance tunnel junctions with Mg-B-O barriers and Ni-Fe-B free electrodes
J. C. Read, J. J. Cha, W. F. Egelhoff Jr., H. W. Tseng, P. Y. Huang, Y. Li, D. A. Muller, and R. A. Buhrman, Appl. Phys. Lett. 94 112504 (2009). [pdf]

Bias and angular dependence of spin-transfer torque in magnetic tunnel junctions

C. Wang, Y.-T. Cui, J. Z. Sun, J. A. Katine, R. A. Burhman, and D. C. Ralph, Phys. Rev. B 79, 224416 (2009). [pdf]

A Three-terminal approach to developing spin-torque written magnetic random access memory cells
P. M. Braganca, J. A. Katine, N. C. Emley, D. Mauri, J. R. Childress, P. M. Rice, E. Delenia, D. C. Ralph, and R. A. Buhrman, IEEE Transactions on Nanotechnology 8, 190 (2009). [pdf]

2008
Spin-torque-induced rotational dynamics of a magnetic vortex dipole
G. Finocchio, O. Ozatay, L. Torres, R. A. Buhrman, D. C. Ralph, and B. Azzerboni, Phys. Rev. B 78, 174408 (2008). [pdf]

Strong linewidth variation for spin-torque nano-oscillators as a function of in-plane magnetic field angle
K. V. Thandani, G. Finocchio, Z.-P. Li, O. Ozatay, J. C. Sankey, I. N. Krivorotov, Y.-T. Cui, R. A. Buhrman, and D. C. Ralph, Phys. Rev. B 78, 024409 (2008). [pdf]

Resonant spin-transfer-driven switching of magnetic devices assisted by microwave current pulses
Y.-T. Cui, J. C. Sankey, C. Wang, K. V. Thadani, Z.-P. Li, R. A. Buhrman, and D. C. Ralph, Phys. Rev. B 77, 214440 (2008). [pdf]

Sidewall oxide effects on spin-torque-and magnetic-field-induced reversal characteristics of thin-film nanomagnets
O. Ozatay, P. G. Gowtham, K. W. Tan, J. C. Read, K. A. Mikoyan, M. G. Thomas, G. D. Fuchs, P. M. Braganca, E. M. Ryan, K. V. Thadani, J. Silcox, D. C. Ralph, and R. A. Buhrman, Nature Materials 7, 567 (2008). [pdf]

Enhancement in spin-torque efficiency by nonuniform spin current generated within a tapered nanopillar spin valve
P. M. Braganca, O. Ozatay, A. G. F. Garcia, O. J. Lee, D. C. Ralph, and R. A. Buhrman, Phys. Rev. B 77, 144423 (2008). [pdf]

Time-domain studies of very-large-angle magnetization dynamics excited by spin transfer torques
I. N. Krivorotov, N. C. Emley, R. A. Buhrman, and D. C. Ralph, Phys Rev. B 77, 054440 (2008). [pdf]

Measurement of the spin-transfer-torque vector in magnetic tunnel junctions

J. C. Sankey, Y.-T. Cu, J. Z. Sun, J. C. Slonczewski, R. A. Buhrman, and D. C. Ralph, Nature Physics 4, 67 (2008). [pdf]

2007
Spatially resolved electron energy-loss spectroscopy of electron-beam grown and sputtered CoFeB/MgO/CoFeB magnetic tunnel junctions
J. J. Cha, J. C. Read, R. A. Buhrman, and D. A. Muller, Appl. Phys. Lett. 91, 062516 (2007). [pdf]

Magnetization reversal driven by spin-polarized current in exchange-biased nanoscale spin valves

G. Finocchio, I. N. Krivorotov, L. Torres, R. A. Buhrman, D. C. Ralph, and B. Azzerboni, Phys. Rev. B 76, 174408 (2007). [pdf]

Spin-torque ferromagnetic resonance measurements of damping in nanomagnets
G. D. Fuchs, J. C. Sankey, V. S. Pribiag, L. Qian, P. M. Braganca, A. G. F. Garcia, E. M. Ryan, Z.-P. Li, O. Ozatay, D. C. Ralph, and R. A. Buhrman, Appl. Phys. Lett. 91, 062507 (2007). [pdf]

Large-amplitude coherent spin waves excited by spin-polarized current in nanoscale spin valves
I. N. Krivorotov, D. V. Berkov, N. L. Gorn, N. C. Emley, J. C. Sankey, D. C. Ralph, and R. A. Buhrman, Phys. Rev. B 76, 024418 (2007). [pdf]

Magnetic vortex oscillator driven by d.c. spin-polarized current
V. S. Pribiag, I. N. Krivorotov, G. D. Fuchs, P. M. Braganca, O. Ozatay, J. C. Sankey, D. C. Ralph, and R. A. Buhrman, Nature Physics 3, 498 (2007). [pdf]

Micromagnetic Modeling of Magnetization Switching Driven by Spin-polarized Current in Magnetic Tunnel Junctions
G. Finochio, B. Azzerboni, G. D. Fuchs, R. A. Buhrman, and L. Torres, J. Appl. Phys. 101, 063914 (2007). [pdf]

Andreev reflection measurements of spin polarization
P. Chalsani, S. K. Upadhyay, O. Ozatay, and R. A. Buhrman, Phys. Rev. B 75, 094417 (2007). [pdf]

X-ray photoemission study of CoFeB/MgO thin film bilayers
J. C. Read, P. G. Mather, and R. A. Buhrman, Appl. Phys. Lett. 90, 132503 (2007). [pdf]