Faculty · Department of Electrical Engineering

Ashwin A. Tulapurkar

Ashwin A. Tulapurkar

Contact

Email:
ashwin@ee.iitb.ac.in

Office:
+91-22-2576-7405

Address:
Department of Electrical Engineering IIT Bombay, Powai Mumbai 400076, India

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Research Interests

Spintronics Physics of nano-devices Spin-current induced magnetization switching RF properties of spintronic devices Noise Thermoelectric effects

Qualifications

  • • Ph.D., Tata Institute of Fundamental Research (TIFR), Mumbai, India 1999
  • • B. Tech. (Engineering Physics), Indian Institute of Technology, Mumbai,1992.

Work Experience

  • • Professor, IIT. Bombay, India, 2015-present
  • • Associate Professor, IIT. Bombay, India, 2009-2015
  • • Osaka University, Osaka, Japan 2008-2009
  • • Stanford Linear Accelerator Center, Stanford University, USA 2005-2008
  • • National Institute for Advanced Industrial Science and Technology (AIST), Tsukuba, Japan 2002 – 2005
  • • Tata Institute of Fundamental Research (TIFR), Mumbai, India 2000 – 2002

Publications

Journal Papers ▼
  • Debasis Das, Ashwin Tulapurkar, and Bhaskaran Muralidharan, "Scaling Projections on Spin-Transfer Torque Magnetic Tunnel Junctions" , IEEE Transactions on Electron Devices, vol. 65, pp. 724-732, Feb. 2018. [ DOI ]
  • A. A. Tulapurkar and Y. Suzuki, "Boltzmann approach to dissipation produced by a spin-polarized current" , Phys. Rev. B, vol. 83, 2011.
  • A. A. Tulapurkar and Y. Suzuki, "Contribution of electron-magnon scattering to spin-dependent Seebeck effect in a ferromagnet" , Solid State Communications (special issue on Spin-caloritronics), vol. 150, pp. 466, 2010.
  • T. Maruyama, Y. Shiota, T. Nozaki, K. Ohta, N. Toda, M.Mizuguchi, A. A. Tulapurkar, T. Shinjo, M. Shiraishi, S. Mizukami, Y. Ando, Y. Suzuki, "Large voltage-induced magnetic anisotropy change in a few atomic layers of iron" , Nature Nanotechnology, vol. 4, pp. 158-161, Jan. 2009.
  • Takeshi Seki, Hiroyuki Tomita, Ashwin A. Tulapurkar , Masashi Shiraishi, Teruya Shinjo, and Yoshishige Suzuki, "Spin-transfer-torque-induced ferromagnetic resonance for Fe/Cr/Fe layers with an antiferromagnetic coupling field" , Appl. Phys. Lett., vol. 94, 2009.
  • J.P. Strachan, V. Chembrolu, Y. Acremann, X.W. Yu, A.A. Tulapurkar, T. Tyliszczak, J.A. Katine, M.J. Carey, M.R. Scheinfein, H.C.Siegmann, and J. Stohr, "Direct Observation of Spin-Torque Driven Magnetization Reversal through Nonuniform Modes" , Physical Review Letters, vol. 100, 2008.
  • Yamaguchi, H. Miyajima, T. Ono, Y. Suzuki, S. Yuasa, A. Tulapurkar, and Nakatani, "Rectification of radio frequency current in ferromagnetic nanowire" , Applied Physics Letters, vol. 90, 2007.
  • Suzuki Y, Tulapurkar A, Yagami K, Devolder T, Fukushima A, Kubota H, Yuasa S, Crozat P, Chappert C, "Ultrahigh speed spin-transfer magnetization switching in magnetic multilayers" , Japanese Journal of Applied Physics, vol. 45, 2006.
  • Yagami K, Tulapurkar AA, Fukushima A, Suzuki Y, "Inspection of intrinsic critical currents for spin-transfer magnetization switching" , IEEE Transactions on Magnetics, vol. 41, pp. 2615, 2005.
  • T. Devolder, P. Crozat, C. Chappert, J. Miltat, A. Tulapurkar, Y. Suzuki, K.Yagami, "Instability threshold versus switching threshold in spin-transfer-induced magnetization switching" , Physical Review B, vol. 71, 2005.
  • T. Devolder, C. Chappert, P. Crozat, A. Tulapurkar, Y. Suzuki, J. Miltat, K.Yagami, "Precharging strategy to accelerate spin-transfer switching below the nanosecond" , Applied Physics Letters, vol. 86, 2005.
  • T. Devolder, A. Tulapurkar, Y. Suzuki, C. Chappert, P. Crozat, and K. Yagami, "Temperature study of the spin-transfer switching speed from dc to 100 ps" , Journal of Applied Physics, vol. 98, 2005.
  • K. Yagami, A. A. Tulapurkar, A. Fukushima, and Y. Suzuki, "Estimation of thermal durability and intrinsic critical currents of magnetization switching for spin-transfer based magnetic random access memory" , Japanese Journal of Applied Physics, vol. 97, 2005.
  • Devolder T., Tulapurkar A., Yagami K., Crozat P., Chappert C., Fukushima A., Suzuki Y, "Ultra-fast magnetization reversal in magnetic nano-pillars by spin-polarized current" , Journal of Magnetism and Magnetic Materials, vol. 286, 2005.
  • Akio Fukushima, Kojiro Yagami, Ashwin A. Tulapurkar , Yoshishige Suzuki, Hitoshi Kubota, Atsushi Yamamoto, and Shinji Yuasa, "Peltier Effect in Sub-micron-Size Metallic Junctions" , Japanese Journal of Applied Physics, vol. 44 (Part 2), 2005.
  • A. Tulapurkar, Y. Suzuki, A. Fukushima, H. Kubota, H. Maehara, K. Tsunekawa, D. D. Djayaprawira, N. Watanabe, and S. Yuasa, "Spin-torque diode effect in magnetic tunnel junctions" , Nature, 2005.
  • K. Yagami, A. A. Tulapurkar, A. Fukushima, and Y. Suzuki, "Low-current spin-transfer switching and its thermal durability in a low-saturation-magnetization nanomagnet" , Applied Physics Letters, vol. 85, 2004.
  • A. Tulapurkar, T. Devolder, K. Yagami, P. Crozat, C. Chappert, A.F ukushima, Y. Suzuki, "Subnanosecond magnetization reversal in magnetic nanopillars by spin angular momentum transfer" , Applied Physics Letters, vol. 85, 2004.
  • Kundaliya D.C., Vij R., Kulkarni R.G., Tulapurkar A.A., Pinto R., Malik S.K., Yelon W.B., "Structural, magnetic and magnetotransport properties of the La0.67Ca0.33Mn0.9Fe0.1O3 perovskite" , Journal of Magnetism and Magnetic Materials, vol. 264, pp. 62, 2003.
  • Darshan C. Kundaliya, A. A. Tulapurkar, S. R. Shinde, R. Pinto,W. B. Yelon, R. G. Kulkarni, and S. K. Malik, "Giant magnetoresistance properties of the La1-2xRxAxMnO3 (R=Nd, A=Ca) perovskites" , Journal of Applied Physics, vol. 93, 2003.
  • S.N. Mishra, P. Taneja, P. Ayyub, A. A. Tulapurkar, "Local magnetism of Fe in Ag nanoparticles" , Physica B, vol. 312, pp. 162-164, 2002.
  • Kundaliya DC, Vij R, Tulapurkar AA, Vaidya U, Pinto R, Kulkarni RG, "Temperature hysteretic effect and its influence on colossal magnetoresistance of La0.33Nd0.33Ca0.33MnO3" , Pramana-Journal of Physics, vol. 58, 2002.
  • Kundaliya DC, Tulapurkar AA, John J, Pinto R, Kulkarni RG, "Enhanced temperature-independent magnetoresistance below the metal-insulator transition temperature of epitaxial La0.2Nd0.4Ca0.4MnO3 thin films" , Pramana-Journal of Physics, vol. 58, 2002.
  • Kundaliya D.C., Tulapurkar A.A., Pinto R., Kumar R., Kulkarni R.G., "A comparative study of magnetotransport and magnetization in epitaxial La0.6Nd0.2Ca0.2MnO3 unirradiated and heavy ion irradiated thin films" , Solid state Communications, vol. 122, 2002.
  • D. Pal, S. Sarkar, A. Tulapurkar, S.Ramakrishnan, A. K. Grover, G. Ravikumar, D. Dasgupta, Bimal K. Sarma, C. V. Tomy, G. Balakrishnan, D Mck Paul, "Comparison of the history effects in magnetization in weakly pinned crystals of high Tc and low Tc superconductors" , Superconducting Science and Technology, vol. 15, pp. 254-257, 2002.
  • D. C. Kundaliya, A. A. Tulapurkar, J. John, R. Pinto, R. G. Kulkarni, "Giant magnetoresistance in perovskite-like La0.6Nd0.2Ca0.2MnO3 thin films" , Physica B, vol. 312, pp. 745-746, 2002.
  • A. Tulapurkar, A. K. Grover, S. Ramakrishnan, A. Niazi, A. K. Rastogi, "Peak effect studies in 2H-NbS2" , Physica B, vol. 312, pp. 118-119, 2002.
  • S. Demuynch, S.N. Mishra, A.A. Tulapurkar, S. Cottenier, J.Meersschaut, M. Rots, "Spin fluctuations in Y1-xScxMn2 and Y(M n1-xAlx)2 observed by perturbed-angular correlation spectroscopy" , Physica B, vol. 293, 2001.
  • A.Tulapurkar, D. Heidarian, S. Sarkar, S. Ramakrishnan, A. K. Grover, E.Yamamoto, Y. Haga, M. Hedo, Y. Inada and Y. Onuki, "Elucidation of the stable state vortex state across the peak effect region in CeRu2" , Physica C, vol. 355, 2001.
  • A. Tulapurkar, "Critical current density from magnetization hysteresis data using the critical-state model" , Physical Review B, vol. 64, 2001.
  • A.Tulapurkar, S.N. Mishra, R.G. Pillay, H. Salunke, G. P. Das and S. Cottenier, "Local magnetism of isolated Mo atoms at substitutional and interstitial sites in Yb metal: Experiment and theory" , Physical Review Letters, vol. 85, 2000.
  • A.Tulapurkar and S. N. Mishra, "Magnetic and quadrupole interaction studies at 111Cd in GdMn2 and TbMn2" , Hyperfine Interactions, vol. 120/121, pp. 247, 1999.
  • A. Tulapurkar, S. N. Mishra, E. V. Sampathkumaran, "Local magnetism of Ce in the Kondo lattice compound CeFeGe3" , Hyperfine Interactions, vol. 120/121, pp. 199, 1999.
  • A. Tulapurkar, S. N. Mishra and Z. Hossain, "Local magnetism of Ce in CeNi2B2C: A PAC study" , Hyperfine Interactions, vol. 120/121, pp. 225-229, 1999.
  • V.V. Krishnamurthy, A. A. Tulapurkar, S. N. Mishra, S. K. Malik, D. T. Adroja, B. D. Rainford, "TDPAC Study of Ce Local Susceptibility in the Kondo Insulator System CeNi1-xCoxSn" , Physica B, vol. 223&224;, pp. 262, 1996.
  • A.Tulapurkar, V. V. Krishnamurthy, S. N. Mishra and S. H.Devare, "Quadrupole and magnetic interaction studies at 111Cd in YMn2" , Hyperfine Interactions, vol. C1, pp. 100, 1996.
  • V. P. S. Awana , Ashwin Tulapurkar, S. K. Malik and A. V. Narlikar, "Role of Ca in enhancing the superconductivity of YBa2Cu3O7-y" , Physical Review B, vol. 50, 1994.
  • A. A. Tulapurkar and Y. Suzuki, "Contribution of electron-magnon scattering to spin-dependent Seebeck effect in a ferromagnet" in Solid State Communications (special issue on Spin-caloritronics) , Dec. 2011.
  • Y. Suzuki, A. A. Tulapurkar and C. Chappert, "Spin Injection Phenomena and applications" in Nanomagnetism and Spintronics , Elsevier, Dec. 2009.