Samir Garzon Curriculum Vitae by lonyoo

VIEWS: 77 PAGES: 5

									Samir Garzon                                                                C.V. Feb. 2009

Department of Physics & Astronomy and USC Nanocenter                 Office: 803-777-6089
University of South Carolina                                         Mobile: 301.520.2868
1212 Greene St, Columbia, SC 29208 USA                                 Fax: 803.777.7041
                                                               sgarzon@physics.sc.edu


E DUCATION
Ph.D. in Physics                                                                 May 2005
University of Maryland, College Park, MD
Supervisor: Richard A. Webb, Ph.D.
Spin injection and detection in copper spin valve structures

B.S. in Physics                                                              May 1998
Universidad de los Andes, Bogota, COLOMBIA
Supervisors: Philippe Binder, Ph.D. and Thomas Dittrich, Ph.D.
Chaotic scattering of a magnetic dipole in a time dependent magnetic field
Five year scholarship, awarded to applicants with the highest scores in the Colombian
national higher-education exam (ICFES).

P ROFESSIONAL E XPERIENCE
R ESEARCH
Research Assistant Professor                                             May 2007 - present
Department of Physics & Astronomy and USC Nanocenter
University of South Carolina, Columbia, SC
Supervisors: Richard A. Webb, Ph.D. and Thomas M. Crawford, Ph.D.
Spin torque driven magnetization switching via shaped current pulses
By using pairs of ultra-short electrical pulses with precisely adjusted amplitudes and tim-
ing, we demonstrated coherent control over the magnetization dynamics in a nanomag-
net. Using this technique we were able to efficiently set the magnetic state of a nanomag-
net by using less energy than previously reported.

Postdoctoral Fellow                                          February 2005 – May 2007
Department of Physics & Astronomy and USC Nanocenter
University of South Carolina, Columbia, SC
Supervisor: Richard A. Webb, Ph. D.
Shot noise in magnetic tunnel junctions
Observed enhanced spin-dependent shot noise in single ∼100×100 nm2 magnetic tunnel
barriers, suggesting tunneling through multiple interacting localized states within the
barrier.
Samir Garzon                                                               C.V. Feb. 2009

Spin momentum transfer induced dynamics in nanopillar devices
Measurement of resistance oscillations in the GHz range produced by spin polarized elec-
trical currents.

Research Assistant                                               June 2000 – January 2005
Department of Physics
University of Maryland, College Park, MD
Supervisor: Richard A. Webb, Ph. D.
Spin injection and detection in copper spin valve structures
Measured the spin relaxation length in Cu using a nonlocal geometry which effectively
separates charge and spin currents, and found that a previously overlooked component
of the nonlocal voltage could be related to the spin-flip scattering at the injector-Cu and
detector-Cu interfaces.

T EACHING
Lecturer                                                                  Spring 2008
University of South Carolina, Columbia, SC
Electromagnetism and optics for Honor College students and physics majors

Teaching Assistant                                                 Fall 1999 - Spring 2000
University of Maryland, College Park, MD
Fundamentals of Physics I & II and Physics of Sound

Teaching Assistant                                                 Fall 1998 - Spring 1999
Universidad de los Andes, Bogota, COLOMBIA
Fundamentals of Physics

Teacher                                                       Fall 1996 – Spring 1998
Colegio San Carlos, Bogota, COLOMBIA
High school physics grades 11 and 12 (Textbook: Serway & Faughn).

Teacher                                                           Fall 1994 – Spring 1995
Liceo Moderno Campestre, Bogota, COLOMBIA
High school physics grades 11 and 12

T ECHNIQUES
• Nanodevice fabrication using electron beam lithography.
• Physical vapor deposition (thermal, e-beam, and sputtering).
• Atomic and magnetic force microscopy.
• Low temperature, low noise, transport measurements.
• Optical pulse shaping and opto-electronic devices.


                                            2
Samir Garzon                                                                  C.V. Feb. 2009


• High frequency measurement and characterization.
• Extensive experience with C, Mathematica, and Labview.

P RESENTATIONS
Macrospin model of incubation delay due to field-like spin transfer torque, American Physical
Society Condensed Matter Annual Meeting, Pittsburgh, PA, March 16-20, 2009.

Invited speaker, Coherent nanomagnet control via ultrashort spin torque pulses, South Eastern
Ultra Fast Conference, Orlando, FL, January 15-16, 2009.

Spin-Torque Induced Switching in Nanomagnets, Physics Colloquium, University of South
Carolina, Columbia, SC, November 20, 2008.

Control of nanomagnet dynamics via ultrafast spin torque pulses, Condensed Matter Seminar,
University of Delaware, Newark, DE, November 18, 2008.

Invited speaker, Spin-Torque Induced Switching in Nanomagnets, 53rd Annual Conference
on Magnetism and Magnetic Materials, Austin, TX, November 10-14, 2008.

Coherent control of nanomagnet dynamics via ultrafast spin torque pulses, Condensed Matter
Seminar, University of Buffalo, Buffalo, NY, April 1, 2008.

Spin-torque-induced coherent dynamics in multilayer nanomagnets, Seagate Report, Pittsburgh,
PA, December 12, 2007.

Enhanced spin-dependent shot noise in magnetic tunnel junctions, 52nd Annual Conference on
Magnetism and Magnetic Materials, Tampa, FL, November 5-9, 2007.

Spin torque driven magnetization switching via shaped current pulses, 52nd Annual Conference
on Magnetism and Magnetic Materials, Tampa, FL, November 5-9, 2007.

Invited speaker, Spin transport and spin-flip scattering in magnetic multilayer structures,
American Physical Society Condensed Matter Annual Meeting, Baltimore, MD, March
13-17, 2006.

Temperature-Dependent Asymmetry of the Nonlocal Spin-Injection Resistance: Evidence for Spin
Nonconserving Interface Scattering, American Physical Society Condensed Matter Annual
Meeting, Los Angeles, CA, March 21-25, 2005.

Spin Injection and Detection in Mesoscopic Spin-Valve Structures, Condensed Matter Seminar,
Universidad de los Andes, Bogota, COLOMBIA, February 15, 2005.



                                             3
Samir Garzon                                                                    C.V. Feb. 2009


P UBLICATIONS
Y. Chen, S. Garzon, and R. A. Webb, Tunable quantum interference between noisy electron
sources, submitted to Phys. Rev. Lett. (Dec. 2008).

S. Garzon, R. A. Webb, M. Covington, S. Kaka, and T.M. Crawford, Effect of resistance-
current feedback on spin torque-induced switching, in preparation.

S. Garzon, Y. Bazaliy, R.A. Webb, T.M. Crawford, M. Covington, and S. Kaka, Macrospin
model of incubation delay due to the field-like spin transfer torque, accepted for publication in
Phys. Rev. B (R) (Feb. 2008).

Z. Cai, S. Garzon, D. Veereddy, X. Tao, P. Muzykov, X. Li, T. S. Sudarshan, R. A. Webb,
and G. Koley, Direction-controlled Growth and Characterization of Indium Nitride Nanowires,
submitted as Proceeding of the 2009 Spring MRS Conference (Oct. 2008).

B. Knaus, S. Garzon, and T.M. Crawford, Alkanethiol induced changes in the magnetotrans-
port properties of Co/Au bilayers, J. Appl. Phys. 105, 07A903 (2009). Selected for the Virtual
Journal of Nanoscale Science & Technology.

S. Garzon, L. Ye, R.A. Webb, T.M. Crawford, M. Covington, and S. Kaka, Coherent control
of nanomagnet dynamics via ultrafast spin torque pulses, Phys. Rev. B 78, 180401(R) (2008).
Editor’s pick. Highlighted in Physics.

Z. Cai, S. Garzon, M.V.S. Chandrashekhar, R.A. Webb, and G. Koley, Synthesis and Proper-
ties of High-Quality InN Nanowires and Nano-networks, Mater. Res. Soc. Symp. Proc. 1058,
JJ06-13 (2008).

Z. Cai, S. Garzon, R.A. Webb, and G. Koley, Synthesis and Properties of High-Quality InN
Nanowires and Nano-networks, J. Elect. Mat. 37, 585 (2008).

S. Garzon, Y. Chen, and R.A. Webb, Enhanced spin-dependent shot noise in magnetic tunnel
barriers, Physica E 40, 133 (2007).

               ˇ c
S. Garzon, I. Zuti´ , and R.A. Webb, Temperature-Dependent Asymmetry of the Nonlocal Spin-
Injection Resistance: Evidence for Spin Nonconserving Interface Scattering, Phys. Rev. Lett. 94,
176601 (2005).

S KILLS
• S TUDENT SUPERVISION : Trained six graduate students in scanning electron micro-
  scope operation, electron beam lithography, physical vapor deposition, atomic force
  microscopy, and transport measurements. Supervised two graduate students, work-
  ing on different projects: spin torque driven dynamics and magnetic tunnel junctions.


                                               4
Samir Garzon                                                           C.V. Feb. 2009


  Co-supervised one graduate student working on Au-thiol magnetism.
• S CIENTIFIC WRITING : Prepare reports and presentations for Seagate Research. Con-
  tribute to writing proposals for the National Science Foundation and the Department
  of Energy.

A DDITIONAL I NFORMATION
L ANGUAGES : English, Spanish (native)
W ORK ELIGIBILITY: Nonresident alien, H1-B work visa required

L OCAL A DDRESS
319 Granby Crossing
Cayce, SC 29033
Tel. 301-520-2868

P ERMANENT A DDRESS A BROAD
Calle 20A Sur #22-160, Casa 137
Conjunto Santa Cecilia, El Poblado
Medellin, Colombia
Tel. 571-334-5678




                                         5

								
To top