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Quantitative decoding of interactions in tunable nanomagnet arrays using first order reversal curves

Gilbert, D. A., G. T. G.T. Zimanyi, R. K. Dumas, M. Winklhofer, A. Gomez, N. Eibagi, J.L. Vicent, and Kai Liu (2014), Quantitative decoding of interactions in tunable nanomagnet arrays using first order reversal curves, Scientific Reports, 4, ArtNr 4204, doi:10.1038/srep04204, OPEN ACCESS.

Abstract
To develop a full understanding of interactions in nanomagnet arrays is a persistent challenge, critically impacting their technological acceptance. This paper reports the experimental, numerical and analytical investigation of interactions in arrays of Co nanoellipses using the first-order reversal curve (FORC) technique. A mean-field analysis has revealed the physical mechanisms giving rise to all of the observed features: a shift of the non-interacting FORC-ridge at the low-HC end off the local coercivity HC axis; a stretch of the FORC-ridge at the high-HC end without shifting it off the HC axis; and a formation of a tilted edge connected to the ridge at the low-HC end. Changing from flat to Gaussian coercivity distribution produces a negative feature, bends the ridge, and broadens the edge. Finally, nearest neighbor interactions segment the FORC-ridge. These results demonstrate that the FORC approach provides a comprehensive framework to qualitatively and quantitatively decode interactions in nanomagnet arrays.
Further information
BibTeX
@article{id1963,
  author = {D. A. Gilbert and G. T. G.T. Zimanyi and R. K. Dumas and M. Winklhofer and A. Gomez and N.  Eibagi and J.L. Vicent and Kai Liu},
  journal = {Scientific Reports},
  month = {feb},
  note = {OPEN ACCESS},
  pages = {ArtNr 4204},
  title = {{Quantitative decoding of interactions in tunable nanomagnet arrays using first order reversal curves}},
  volume = {4},
  year = {2014},
  url = {http://www.nature.com/srep/2014/140226/srep04204/full/srep04204.html},
  doi = {10.1038/srep04204},
}
EndNote
%0 Journal Article
%A Gilbert, D. A.  
%A G.T. Zimanyi, G. T.
%A Dumas, R. K.
%A Winklhofer, M.
%A Gomez, A.
%A Eibagi, N. 
%A Vicent, J.L.
%A Liu, Kai
%D 2014
%V 4
%J Scientific Reports
%P ArtNr 4204
%Z OPEN ACCESS
%T Quantitative decoding of interactions in tunable nanomagnet arrays using first order reversal curves
%U http://www.nature.com/srep/2014/140226/srep04204/full/srep04204.html
%8 feb
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Printed 21. Aug 2019 16:03