Thickness-dependent magnetic properties of oxygen-deficient EuO.

Authors :: Barbagallo, M.
Stollenwerk, T.
Kroha, J.
Steinke, N.-J.
Hine, N. D. M.
Cooper, J. F. K.
Barnes, C. H. W.
Ionescu, A.
Monteiro, P. M. D. S.
Kim, J.-Y.
Ziebeck, K. R. A.
Kinane, C. J.
Dalgliesh, R. M.
Charlton, T. R.
Langridge, S.
Source :: Physical Review B: Condensed Matter & Materials Physics. Aug2011, Vol. 84 Issue 7, p75219:1-75219:5. 5p.
Publication Year :: 2011
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 these surface-induced effects are caused by the reduced number of nearest neighbors, band bending, and the partial depopulation of the 4f states of Eu. [ABSTRACT FROM AUTHOR]