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Investigation of ion beam deposited spin valve interface structure by 59Co nuclear magnetic resonance

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5 Author(s)
Jedryka, Ewa ; Institute of Physics, Polish Academy of Sciences, 02 668 Warszawa, Poland ; Bailey, William E. ; Wojcik, Marek ; Nadolski, S.
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59Co nuclear magnetic resonance was used to study the bulk and interface microstructure in the unpinned Co layer in a series of highly (111)-textured ion beam deposited spin valves. The intent of the study is to determine the degree of Co interface intermixing and any possible variation of the Co layer microstructure as a result of weakening (111) texture of the NiFe/Co/Cu/Co/NiFe/FeMn film stack. We found that the interfaces are diffused over ∼2 monolayers on both sides of the Co layer, involving an equivalent of about 3 Å of Co per interface and vary only slightly with deteriorating texture. The main structural change is the drop of perfect fcc stacking in the Co layer. © 1999 American Institute of Physics.

Published in:

Journal of Applied Physics  (Volume:85 ,  Issue: 8 )