Measurements of Spin Polarization of Epitaxial SrRuO3 Thin Films

Details Measurements of Spin Polarization of Epitaxial SrRuO3 Thin Films Measurements of Spin Polarization of Epitaxial SrRuO3 Thin Films

2002-09-07

arxiv.org/abs/cond-mat/0209178v1

Physics

Condensed Matter

Strongly Correlated Electrons

12 pages pdf only

Scientific paper

10.1063/1.1539551

We have measured the transport spin-polarization of epitaxial thin films of the conductive ferromagnetic oxide, SrRuO3, using Point Contact Andreev Reflection Spectroscopy (PCAR). In spite of the fact that spin-up and spin-down electronic densities of states at the Fermi level for SrRuO3 calculated from band structure theory are practically the same, the experimental transport spin polarization for these films was found to be about 50%. This result is a direct consequence of the Fermi velocity disparity between the majority and minority bands and is in good agreement with our theoretical estimates.

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