Thickness-dependent magnetic properties of oxygen-deficient EuO

M. Barbagallo; T. Stollenwerk; J. Kroha; N. -J. Steinke; N. D. M. Hine; J. F. K. Cooper; C. H. W. Barnes; A. Ionescu; P. M. D. S. Monteiro; J. -Y. Kim; K. R. A. Ziebeck; C. J. Kinane; R. M. Dalgliesh; T. R. Charlton; S. Langridge

doi:10.1103/PhysRevB.84.075219

Thickness-dependent magnetic properties of oxygen-deficient EuO

Materials Science 2012-02-07 v1 Mesoscale and Nanoscale Physics

Authors: M. Barbagallo , T. Stollenwerk , J. Kroha , N. -J. Steinke , N. D. M. Hine , J. F. K. Cooper , C. H. W. Barnes , A. Ionescu , P. M. D. S. Monteiro , J. -Y. Kim , K. R. A. Ziebeck , C. J. Kinane , R. M. Dalgliesh , T. R. Charlton , S. Langridge

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Abstract

We have studied how the magnetic properties of oxygen-deficient EuO sputtered thin films vary as a function of thickness. The magnetic moment, measured by polarized neutron reflectometry, and the Curie temperature are found to decrease with reducing thickness. Our results indicate that the reduced number of nearest neighbors, band bending and the partial depopulation of the electronic states that carry the spins associated with the 4f orbitals of Eu are all contributing factors in the surface-induced change of the magnetic properties of EuO $_{1-x}$ .

Keywords

EuO thin films oxygen deficiency magnetic properties thickness dependence polarized neutron reflectometry Curie temperature surface effects

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@article{arxiv.1104.4363,
  title  = {Thickness-dependent magnetic properties of oxygen-deficient EuO},
  author = {M. Barbagallo and T. Stollenwerk and J. Kroha and N. -J. Steinke and N. D. M. Hine and J. F. K. Cooper and C. H. W. Barnes and A. Ionescu and P. M. D. S. Monteiro and J. -Y. Kim and K. R. A. Ziebeck and C. J. Kinane and R. M. Dalgliesh and T. R. Charlton and S. Langridge},
  journal= {arXiv preprint arXiv:1104.4363},
  year   = {2012}
}

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4 pages, 3 figures, 1 table

Thickness-dependent magnetic properties of oxygen-deficient EuO

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