List of JRP papers

The 'SpinCal EXL04' Joint Research Project has produced so far:

  • 24 papers in peer-reviewed journals, among which:
  • 5 papers in journals with Impact Factor greater than 5

Publication single view


Phase diagram of magnetic states in nickel submicron disks

Author(s): Tom Wren, Boris Gribkov, Victor Petrashov and Olga Kazakova
Journal: J. Appl. Phys.
Year: 2015
Month: July
Day: 9
Volume: 118
Issue: 023906
DOI: 10.1063/1.4926500
Abstract: We present a detailed study of the magnetic states in sub-micron nickel disks in the diameter range of 300–900 nm and thickness of 15–55 nm using magnetic force microscopy and micromagnetic simulations. In this dimensional range, we find three main magnetic states, namely: the single domain state, the vortex state, and the stripe domain state. We identify the crossover dimensions between these magnetic states, demonstrating that the disk thickness is the dominant parameter, which is further supported by the fact that the magnetocrystalline anisotropy of the Ni films is thickness dependant and plays a dominant role at large thicknesses. Experimental results are in a very good agreement with micromagnetic modelling using the out-of-plane effective anisotropy constant. Using in-situ high resolution Magnetic Force Microscopy techniques, we investigate in detail the motion of the vortex core under applied in-plane magnetic field and find that vortex nucleates and annihilates at ∼100 Oe.

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