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Publication
Surface Science
Paper
Magnetism at the surface of the Heisenberg ferromagnet EuS
Abstract
The critical exponent β1 of the surface of the isotropic Heisenberg ferromagnet EuS has been determined with spin-polarized low-energy electron diffraction (SPLEED): We find β1=0.72±0.03, a value which differs significantly from theoretical estimates. Reasons for this discrepancy will be discussed. Spin-polarized electron energy loss spectroscopy (SPEELS) shows intra-atomic and inter-atomic transitions. We report the first observation of the surface red shift of the 4f7-5dt2g absorption edge with EELS. This shift is found to be identical to that of the bulk as measured by optical absorption. © 1987 Elsevier Science Publishers B.V. (North-Holland Physics Publishing Division).