Dmitriy Bolotin, M.S. student, Nanotechnology Specialist & NCF Trainer



 
 

  • Fig.1. I will help you with training. You can do it too.



  • Fig.2. We'll help you with your masks.



  • Fig.3. Learning wirebonder from our NCF Lab. Manager Robert Lajos. He knows everything.



  • Fig.4. Oxford 100 Plasmalab Deep Reactive Ion Etch System (DRIE).



  • Fig.5. Cleaning our Cleanroom Class 100. A class 100 cleanroom maintains less than one hundred particles larger than 0.5 microns in each cubic foot of air.



    • In addition, I'm working on computer simulation and analysis of nano-magnetic systems. My research focuses on micromagnetic modeling based on The Object Oriented MicroMagnetic Framework (OOMMF) project at ITL/NIST.
    Model verification is achieved by comparison against experimental Magnetic Force Microscopy (MFM) and Lorentz transmission electron Microscopy data (in collaboration with Nestor Zaluzec and Valentyn Novosad at Materials Science Division, Argonne National Laboratory) [1-2].

  • Fig.4. The micromagnetic simulations predict that circular magnetic disks would form a stable "vortex" state at remanence. In this state the magnetization vector remains parallel to the nearest edge in nanomagnet. The existence of the "vortex" state has been confirmed experimentally using Magnetic Force Microscopy and Lorentz microscopy with which the out of plane magnetization of the vortex core can be observed [3-4].


    • References
    [1] Domain formation in arrays of square holes in an Fe film, I. Guedes, M. Grimsditch, V. Metlushko, P. Vavassori, R. Camley, B. Ilic, P. Neuzil, and R. Kumar, Phys. Rev. B 66, 014434 (2002)
    [2] Magnetization of negative magnetic arrays: Elliptical holes on a square lattice, I. Guedes, N. J. Zaluzec, M. Grimsditch, V. Metlushko, P. Vavassori, B. Ilic, P. Neuzil, and R. Kumar, Phys. Rev. B 62, 11719 (2000)
    [3] Magnetization reversal and configurational anisotropy of dense permalloy dot arrays, Xiaobin Zhu, P. Grütter, V. Metlushko, and B. Ilic, Appl. Phys. Lett. 80, 4789 (2002)
    [4] Vortex chirality in an array of ferromagnetic dots, M. Grimsditch, P. Vavassori, V. Novosad, V. Metlushko, H. Shima, Y. Otani, and K. Fukamichi, Phys. Rev. B 65, 172419 (2002)