Reversal behavior of exchange-biased submicron dots

Zhi-Pan Li; Oleg Petracic; Johannes Eisenmenger; Ivan K Schuller

doi:10.1063/1.1863449

Reversal behavior of exchange-biased submicron dots

Materials Science 2009-11-11 v1

Authors: Zhi-Pan Li , Oleg Petracic , Johannes Eisenmenger , Ivan K Schuller

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Abstract

Nanostructured Fe dots were prepared on antiferromagnetic FeF2 thin films and investigated by magneto-optical Kerr effect (MOKE). We studied the influence of dot sizes on the magnetic hysteresis and compared the result with both continuous thin film bilayers and nanostructured Fe/FeF2 pillars. Hysteresis loops were measured at temperatures below and above (10 and 90 K, respectively) the Neel temperature of the antiferromagnet. A vortex state is found for dots of 300 nm diameter, where the exchange bias field is reduced compared to larger dot system and the continuous bilayer. Micromagnetic simulations including the interaction with the antiferromagnet show qualitatively similar behavior.

Keywords

exchange bias submicron dots magnetic hysteresis vortex state antiferromagnet micromagnetic simulation magneto-optical Kerr effect

Cite

@article{arxiv.cond-mat/0501158,
  title  = {Reversal behavior of exchange-biased submicron dots},
  author = {Zhi-Pan Li and Oleg Petracic and Johannes Eisenmenger and Ivan K Schuller},
  journal= {arXiv preprint arXiv:cond-mat/0501158},
  year   = {2009}
}

Reversal behavior of exchange-biased submicron dots

Abstract

Keywords

Cite

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