Transport spin polarisation in SrRuO3 measured through Point Contact Andreev reflection

P. Raychaudhuri; A. P. Mackenzie; J. W. Reiner; M. R. Beasley

doi:10.1103/PhysRevB.67.020411

Transport spin polarisation in SrRuO3 measured through Point Contact Andreev reflection

Strongly Correlated Electrons 2009-11-07 v3 Materials Science

Authors: P. Raychaudhuri , A. P. Mackenzie , J. W. Reiner , M. R. Beasley

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Abstract

We report a study in which Andreev reflection using a Nb point contact is used to measure the transport spin polarisation of the 4d itinerant ferromagnet SrRuO3. By performing the study in high quality thin films with residual resistivities less than 7micro-ohm-cm, we ensure that the study is done in the ballistic limit, a regime which is difficult to reach in oxide ferromagnets. The degree of transport spin polarisation that we find is comparable to that of the hole doped rare-earth manganites. We conclude that the large transport spin polarisation results mainly from a difference in the Fermi velocities between the majority and minority spin channels in this material.

Keywords

transport spin polarisation Andreev reflection SrRuO3 itinerant ferromagnet ballistic limit Fermi velocity

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@article{arxiv.cond-mat/0208044,
  title  = {Transport spin polarisation in SrRuO3 measured through Point Contact Andreev reflection},
  author = {P. Raychaudhuri and A. P. Mackenzie and J. W. Reiner and M. R. Beasley},
  journal= {arXiv preprint arXiv:cond-mat/0208044},
  year   = {2009}
}

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Transport spin polarisation in SrRuO3 measured through Point Contact Andreev reflection

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