Competition between vortex and "s"-like states in laterally confined magnetic trilayers

A V Ognev, M E Stebliy, A S Samardak, Alain Nogaret, L A Chebotkevich

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1 Citation (SciVal)


We report on the magnetization reversal and micromagnetic configurations of Co(10 nm)/Pd(0.8 nm)/Co(10 nm) and Co (20 nm) nanodisks studied as a function of the disk diameter. Using magneto-optical Kerr effect (MOKE) we show that the magnetic fields of vortex nucleation and annihilation decrease while the nanodisk diameter increases. We have discovered that in an array of trilayer nanodisks with diameters D = 200 nm, direct exchange through pinholes and interlayer indirect ferromagnetic exchange coupling promote the formation of a non-uniform "S"-like state with opposed magnetic moments in adjacent Co layers. In larger trilayers nanodisks (D = 400 - 800 nm) the vortex state, like in single layer nanodisk, is formed.
Original languageEnglish
Pages (from-to)157-162
Number of pages6
JournalPhysics Procedia
Publication statusPublished - 2011
Event2011 International Conference on Physics Science and Technology - Dubai, UAE United Arab Emirates
Duration: 28 Dec 201130 Dec 2011


  • hysteresis
  • nanodisk
  • micromagnetic structures


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