The Influence of He+ Ion Bombardment on Magnetic Properties of NiFe/Au/Co/Au Multilayers
P. Kuświk a, B. Szymański a, M. Urbaniak a, F. Stobiecki a, I. Sveklo b, J. Kisielewski b, A. Maziewski b and J. Jagielski c,d
a Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland,
b Institute of Experimental Physics, University of Białystok, Lipowa 41, 15-424 Białystok, Poland
c Institute of Electronic Materials Technology, Wólczyńska 133, 01-919 Warszawa, Poland
d The Andrzej Sołtan Institute for Nuclear Studies, 05-400 Otwock-Świerk, Poland
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The influence of He+ ion bombardment on magnetoresistance, magnetization reversal and domain structure of sputtered (Ni80Fe20(2 nm)/Au(2 nm)/Co(0.6 nm)/Au(2 nm))10 multilayers was investigated. The samples were bombarded using He+(30 keV) ions with fluences D varied from 1013 to 3×1016 He+/cm2. With increasing D the following changes in magnetic properties were observed: (i) exponential decay of the saturation field of Co layers, (ii) progressive decrease in magnetoresistance as a result of degradation of Co layers perpendicular anisotropy, (iii) linear decrease in stripe domain period with log(D).
DOI: 10.12693/APhysPolA.115.352
PACS numbers: 75.70.-i, 75.47.De, 75.30.Gw, 75.70.Kw