PENGARUH BENTUK NOTCH TERHADAP KURVA HISTERISIS BAHAN FEROMAGNETIK NANOWIRE

  • W. Nursiyanto Program Studi Teknik Mesin, Universitas Pancasila, Srengseng Sawah, Jagakarsa, Jakarta 12640
  • B. Soegijono Program Studi Ilmu Material, Universitas Indonesia, Jl. Salemba Raya No.4, Jakarta 10430
  • E. Djatmiko Program Studi Teknik Mesin, Universitas Pancasila, Srengseng Sawah, Jagakarsa, Jakarta 12640

Abstract

Spintronic devices and data storage which based on magnetic usually made from material of  ferromagnetic nanowire. The shape and size of the hysteresis for a ferromagnetic material have a very important meaning in its application on data storage devices. In this research has  investigated hysteresis of  a ferromagnetic material (Fe, Ni and Co) nanowire which has been given  of doubles notch symmetrically  in the middle of the  nanowire with the shape are triangles and arches. Dimensional of nanowire  size is  2000 × 200 × 5 Nm3 with a cell size of 2.5 × 2.5 × 2.5 Nm3 and the factor of damping  is 0.01. The simulation of micromagnetic has been observed with uses software called Object Oriented Framework Micromagnetic (OOMMF) that based on equations of magnetic spin dynamics Landau-Lifshitz-Gilbert (LLG) The initial condition type of  structure domain wall (DW)  has been given  with shape transverse-wall (TW) in the middle of the notch by  the configuration of head-to-head.  And then nanowire has been given external magnetic field with direction of the x-axis started from -150 mT to 150 mT to get hysterisis curve. The result shows that the shape of notch  does not affect the hysteresis curves of ferromag.

Keywords: ferromagnetic, nanowire, notch, oscillations, micromagnetic.

Published
2015-10-30