Özhan Özatay (Associate Professor of Physics)

B.S. : Bogazici University - Electrical and Electronic Engineering (2000)
B.S. : Bogazici University - Physics (2000)
M.S. : Cornell University - Applied and Engineering Physics (2003)
Ph.D.: Cornell University - Applied and Engineering Physics (2007)
Post-doc: San Jose Research Center - Hitachi Global Storage Technologies (2009)

Areas of Interest

  • Spin dependent transport properties of nanomagnetic structures: Giant Magnetoresistance (2007 Physics Nobel Prize), Tunneling Magnetoresistance, Spin-Transfer Torque Switching and Microwave Devices. Applications to Magnetic Sensors and Magnetic Random Access Memory (MRAM).
  • Domain wall dynamics in magnetic nanowires and heat-assisted domain transfer in perpendicular anistropy magnetic multilayers.
  • Point-contact spectroscopy and Andreev reflection measurements of spin polarization.
  • Scanning probe microscopy studies of magnetic surfaces. Magnetic imaging and recording with magnetic force misroscopy.
  • Electrical characterization of switching dynamics and resistance drift properties of Ge2Sb2Te5 phase change memory devices.
  • Transmission/Scanning Electron Microscopy (TEM-SEM) studies of metallic multilayers - controlling interfacial roughness and analysis of interface chemistry with electron-energy loss spectroscopy (EELS) and energy dispersive X-ray measurements.
  • Development of new nanofabrication techniques and strategies for the miniaturization of spintronic devices.
  • Finite-Element Modeling (FEM) of electro-thermal dynamics in phase change memory devices and magnetization dynamics in nanopillar spin-valves.

Selected Publications
  • P. M. Braganca, O. J. Lee, O. Ozatay, L. Liu, G. Finocchio, D. C. Ralph and R. A. Buhrman "Coherent and incoherent spin torque oscillations in a nanopillar magnetic spin-valve" APPLIED PHYSICS LETTERS,102, 252402 (2013)
  • U. Kilic, G. Finocchio, T. Hauet, S. H. Florez, G. Aktas, and O. Ozatay "Magnetic switching driven by nanosecond scale heat and magnetic field pulses: An application of macrospin Landau-Lifshitz-Bloch model" APPLIED PHYSICS LETTERS,101, 252407 (2012)
  • Ozatay O. et al. "Probing Activation Energy Barrier For Reversal of Strongly Exchange-Coupled Magnetic Multilayer Thin Films" APPLIED PHYSICS LETTERS 95 (172502) (2009)
  • Ozatay O, Gowtham PG, Tan KW, et al. "Sidewall oxide effects on spin-torque- and magnetic-field-induced reversal characteristics of thin-film nanomagnets" NATURE MATERIALS 7 (567-573) (2008)
  • Emley NC, Krivorotov IN, Ozatay O, et al. "Time-resolved spin-torque switching and enhanced damping in Permalloy/Cu/Permalloy spin-valve nanopillars" PHYSICAL REVIEW LETTERS 96 (247204 ) (2006)